A 35-year-old man is being held without bail after being arrested as the suspect of a Jan. 30 shooting in Milton.

The Boston region is in the midst of a security emergency as a massive manhunt is underway for one of the suspects in Monday’s bombings that killed three and injured more than 170 people.

A shooting and manhunt triggered a lockdown in Midland, Beaver County on Monday night. Just after 9 p.m., officers were called to a domestic dispute and learned someone left with an AR-15-style rifle.