At least one person was killed after a car exploded on Saturday night in Pennsylvania's third largest city, drawing a massive law enforcement reaction and involvement from federal officials.
The Allentown Police Department said in a statement to Fox News the explosion took place at 9:30 pm at the junction of North Hall Street and West Turner Street.
"When the police arrived at the scene, they discovered that a car had exploded," the statement said. "We can confirm that there is at least one death."
Many residents of the city, located about 60 miles northwest of Philadelphia, reported hearing or feeling the big explosion, the Morning Call reported.
"The fire was crazy," Carlos Perodin told the newspaper. "The car was pretty split in half."
Perodin said he saw a movie with his wife when he heard the thunderous sound.
Neighbors told 69 News that more than one person appeared to be in the car when it exploded, but officials still need to disclose additional details.
The FBI's Philadelphia State Department said that it investigated the incident. It is not clear what caused the explosion or who the intended target was.
"FBI personnel have responded to the Allentown explosion scene, working with our law enforcement partners to assess the situation and identify the cause of security as the highest priority of the Bureau," the agency said. "Anyone who has witness or information about the explosion who has not talked to the investigators is kindly requested to contact us as soon as possible at 215-418-4000 or tips.fbi.gov."
The explosion, which triggered the response of land, state and federal officials, caused authorities or closure of the neighboring residential area. About six blocks downtown were closed by authorities, FOX29 reported.
"We ask the public to avoid the area from 7th to 8th Street and from Linden to Chew Street," the police said. "We also ask the residents living in this area to stay there until further notice."
The Red Cross said that it has established a home for displaced persons.
"The Red Cross has temporary accommodation at Cleveland Elementary School, 424 N. 9th St., Allentown, for anyone displaced by the ongoing police incident on Saturday night," the organization was posted on Twitter.