AUSTIN, Texas (AP) — Police had asked residents living near the site of the latest Austin explosion to remain in their homes until 2 p.m. — but an hour later, the area was still on lockdown.

Police chief Brian Manley said earlier Monday that although officers didn’t find anything suspicious in the southwestern Austin residential neighborhood of Travis Country, investigators were still collecting evidence.

Sunday night’s explosion occurred around 8 p.m.

But it was unclear when police would give the all-clear for residents to leave their homes.

Authorities say Sunday night’s bombing differed from three package bombs earlier this month but may be the work of a serial bomber.

Also, Gov. Greg Abbott announced he was releasing $265,000 in state funds to Austin police and state authorities investigating all four bombings.

Copyright 2018 The Associated Press. All rights reserved. This material may not be published, broadcast, rewritten or redistributed.