The death toll from the US Steel factory in the US state of Pennsylvania has reached two, at least 10 people were injured, NBC reported, citing officials.
"Two people were killed in a bomb blast near the Pittsburgh area. Officials said one missing person was confirmed as dead. At least 10 people were injured, "the TV company said.
The CBS previously reported that at least one person was killed in a bomb blast near the factory, and dozens were injured.
An explosion took place at the US steel factory in Klerto, Pennsylvania.
The Associated Press, referring to the official, said that there are people in the rubble after the explosion.
