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An apparent gas explosion at a house in northern New Jersey killed one person and injured 15 others on Wednesday morning.

Fire officials in Elizabeth, N.J., near Newark, received a call around 8 a.m. about the blast, which flattened the two-story house 鈥渓ike a pancake,鈥� Elizabeth Mayor Chris Bollwage told reporters.

They were able to rescue 14 people from the house, while one man escaped on his own after the explosion on the second floor caused the house to catch on fire, Mr. Bollwage said.

Some of the house鈥檚 occupants were still sleeping when the blast occurred, leaving two people with critical injuries. All the occupants were taken to local hospitals, the mayor said. It also damaged seven houses nearby, including three which will have to be demolished.

"I got hit in the face by my TV set," Kayon Pryce, who owns the house next door, told the Associated Press. "The explosion actually tossed my bed upward, tossed me out of bed and knocked my phone out of my hand. I'm just happy to be alive."

Investigators from local utility company Elizabethtown Gas were busy inspecting the house. Duane Bourne, a company spokesman, told Reuters they hadn鈥檛 found any gas leaks, but the investigation was ongoing.

With more than 177 million Americans relying on natural gas in their homes, according to the American Gas Association, there are several things people can do when they suspect there may be a gas leak.

If you smell gas (such as a 鈥渞otten egg鈥� smell) or hear the hiss of , you should check to see if the burners on your stove are off, and then open the windows to ventilate the house.

If something is obviously wrong, like sparks or flames, you should evacuate the house immediately, warn others nearby and then call 911 from a safe location.

But if you鈥檙e inside, the burners are off and you , don鈥檛 turn on the lights or use other electrical devices, cautions Captain James Altman of the Santa Monica Fire Department.

鈥淭hat could lead to a spark, which causes an explosion," Mr. Altman last year. "You want to make sure you have a flashlight handy."

If you notice the grass or bushes outside have suddenly turned brown or look more rusty, that could be a sign of gas pouring out of the pipes, you should call 911 immediately and then call the gas company.

Other signs of a leak include dirt and dust blowing from a hole in the ground or bubbling in wet or flooded areas.

In Elizabeth, neighbors said the explosion caught them by surprise.

"I heard a loud boom and the house shook a little," Lisset Garcia, who lives about two blocks away, told the Associated Press, saying she was in bed with her daughter when the house exploded. 鈥淎t first, I thought it was a small earthquake or something,鈥� she said.

Material from Reuters and the Associated Press was used in this story.