The National Hockey League has postponed tonight’s Boston Bruins game against the Ottawa Senators at TD Garden. The game was scheduled to take place at 7 p.m.

The game will be rescheduled, according to the league. The Bruins have seven regular-season games remaining before the playoffs. Their next game is scheduled for Wednesday at home against the Buffalo Sabres.

- Fluto Shinzawa, Globe staff

Police Commissioner Davis said that “there were simultaneous explosions” along the finish line of the marathon route, and “each one resulted in multiple casualties.”

He also confirmed a third explosion at the JFK Library and said “we are not certain that these incidents are related, but we are treating them as if they are.”

He urged city residents to stay inside and not congregate in large groups.

“People should be calm, but they should understand that this is an ongoing event.”

Davis said that authorities are searching the bags that spectators left as they fled the scene of the Boylston Street explosions, but “at this point we have not found another device.”

Governor Deval Patrick reiterated that residents should remain at home and remain calm.
“We’ve had a horrific attack here in Boston this afternoon,” Patrick said.

- Travis Anderson, Globe staff

From Boston.com's Jackie Reiss and Matt Rocheleau in Kenmore Square:

In the aftermath of the Boston Marathon explosions, runners and spectators in the Kenmore Square area reacted with shock as police and other personnel tried to bring order to the chaos.

Marathoner Maggie Blanchard, 39, said she had been looking forward to finishing her final mile when another runner stopped her near the intersection of Massachusetts and Commonwealth avenues and told her the race was over.

Blanchard, wrapped in a garbage bag to keep warm Monday afternoon, distractedly looked east as she said that she hadn't gotten in touch with her father yet, who was waiting for her near the finish line.

After using a passerby's phone and leaving yet another frantic message for her father, Blanchard hurriedly headed toward the MBTA bus parked a few steps away.

Runner Paige Scofield, 26, said she knew something was wrong when she saw other marathoners begin to slow and come to a stop.

"Everyone was just standing around," she said. "When I heard, I was terrified. My fiancé was supposed to be waiting for me at the the finish line."

Luckily, her fiance Francisco Contijoch, 26, was underground at the Hynes station when police began evacuating him.

"I couldn't walk anywhere," he said. "I tried looking for her."

The couple described a frantic waiting period where they couldn't get in touch - Contijoch's phone had died, and Scofield didn't run with her phone - until they spotted each other near commonwealth and Massachusetts Avenues.

"We were lucky," Contijoch said.

A school bus shuttled Boston police down Commonwealth ave near Massachusetts Avenue Monday afternoon. At the corner of Massachusetts and Commonwealth avenues, police used megaphones to tell passersby to evacuate the area.

"There have been some explosions. Please evacuate the area," police said on the megaphones. "We're looking for secondary devices."

Runners were directed to take MBTA buses to Boston Common.

Between the Kenmore and Copley square areas, hundreds of people used their cell phones to try to reach loved ones. Many said they were having trouble sending messages and making calls.

Arielle Valdez, a 21-year-old senior at Boston University, said she and her friends were walking toward the Boston Marathon finish line when they heard news that explosions had gone off there.

Valdez said she and her friends were near the corner of Commonwealth and Massachusetts avenue just a few blocks away from the finish line and might have been closer to, or at, Copley Square had they not made several unplanned stops to watch the race.

"It's something you wouldn't expect during the Boston Marathon," she said, sniffling and wiping tears from her cheeks.

"It's not a time for anything like this," she added. "We were here to support the runners but not through a time of grief. This is messed up."

Valdez and her friends, Molly Harrison and Yelena Shuster, both 21-year-old seniors at BU, stayed in the area amid the chaos, handing out their own supplies of water, food and offering cell phones for runners and spectators desperately trying to reach loved ones.

"It's the most scary thing - especially because no one has [cellular] service," said Valdez.

Moments after news outlets sent out alerts and after the news hit social media, some runners continued along the route through Kenmore Square unaware of what had happened.

Others slowed and stopped as they checked cell phones.

From the Globe Metro staff: Two people were killed and dozens were injured this afternoon as two powerful explosions detonated in quick succession near the Boston Marathon finish line in Boston’s Back Bay section, turning a scene of athletic celebration into bloody chaos.

Two more explosive devices were found and dismantled, The Associated Press reported. The Federal Aviation Administration announced a ground stop for Logan International Airport until further notice; it wasn’t clear if the ground stop was related to the blasts.

Asked if the explosions were a result of terrorism, Davis said, “We’re not being definitive on this right now, but you can reach your own conclusions, based on what happened.’