New charges filed against man accused of Central Coast courthouse bombing

Charges are mounting against the man accused of setting off a bomb at the Santa Maria courthouse that injured five people.

The Santa Barbara County District Attorney's Office filed 10 charges against Nathaniel McGuire in connection with the Sept. 25 attack. The charges include attempted murder, using an explosive device with intent to murder and multiple counts of arson.

Santa Barbara County sheriff's investigators said he threw a backpack into the courthouse, which caused minor injuries to five people in the explosion. McGuire was arrested as he fled the scene. Investigators believe the attack was a result of his arrest in the summer on weapons charges.

The 20-year-old Santa Maria man is currently being held by federal authorities in Los Angeles without the possibility of bail. He faces a federal charge of malicious damage to a building with explosives.