MONROE -- A car bomb caused a powerful explosion on a Michigan street that seriously injured a father and his two sons, who are "very fortunate" to have survived the blast and fire that turned their vehicle a blackened hunk of metal, a federal official said Wednesday.
Investigators were poring over what remained vehicle after the Tuesday evening blast, looking for clues about how the device was made and who might have planted it, said Donald Dawkins, a spokesman the Bureau of Alcohol, Tobacco, Firearms and Explosives.
"There was a lot of power behind it. The victims are very fortunate, very blessed, to be alive," Dawkins said.
Among the things investigators are trying to determine is whether one of the victims was targeted or whether the attack was random, Dawkins said. The vehicle exploded Tuesday evening on a tree-lined street under a highway in Monroe, which is about 35 miles southwest of Detroit.
Authorities have not publicly identified the victims, who were listed in serious condition at St. Vincent Medical Center in Toledo, Ohio, which is about 20 miles south of Monroe.
The victims were lucky to survive, said Dawkins, who described the attack as a "heinous crime."
"When you have children involved, it really hits home," said Dawkins.
The ATF is offering a reward of up to $10,000 for anyone who provides information leading to an arrest.
Monroe police, the ATF and others plan to meet later in the afternoon to discuss the status of the investigation.
Monroe is a city of more than 20,000 that is one of Michigan's oldest communities. It has a historic downtown and is home to furniture maker La-Z-Boy Inc.