A man and woman are dead and seven people are seriously injured after three houses exploded Monday morning in northwest Baltimore, fire officials said.

Baltimore City fire officials said Tuesday that crews combing the rubble at 1 a.m. found a man's body. One woman was pronounced dead at the scene Monday morning.

"Just before one o'clock, they did locate the body of an adult male that brings our total fatality to two," Baltimore fire spokeswoman Blair Adams said.

According to Morgan State University, Joseph Graham, a rising sophomore, was the man recovered from the rubble.

The university said in a statement on Tuesday, "It is with a heavy heart that we regretfully share the unfortunate news of the untimely passing a valued member of our Morgan family. MSU student, Joseph Graham, a rising sophomore pursuing an electrical engineering degree from the Clarence M. Mitchell, Jr. School of Engineering, was among the casualties of the widely reported gas explosion that took place in Northwest Baltimore on August 10.

As a community we mourn the tragic loss of life as a result of this calamitous event and offer our deepest sympathies to the Graham family. We ask that you keep them and their extended family and friends in prayer."

"Just before one o'clock, they did locate the body of an adult male that brings our total fatality to two," Baltimore fire spokeswoman Blair Adams said.

Fire officials said seven people were rescued from the scene Monday -- five were in critical condition Tuesday, and fire officials were waiting to determine the status of the other two people.

Three of the victims were taken to Shock Trauma and have since been released. Four others were taken to Sinai Hospital where their conditions are unknown.

Emergency crews were called just before 10 a.m. Monday to a gas explosion on Labyrinth Road near Reisterstown Road.

There were many onlookers Tuesday as crews removed debris at the scene of the explosion. Local, state and federal resources are being used to clear the rubble while looking for evidence of what caused the explosion.

According to sources connected with the investigation, initial indications are the explosion was caused by a release of natural gas from internal piping to one of the homes, not a regulated pipeline. Read more at WBALTV