(BERLIN) — Two World War II bombs were successfully defused in the western German city of Dortmund on Sunday, hours after thousands of people were evacuated from the surrounding area, officials said.

The bombs were 250-kilogram (330-pound) American and British bombs. Authorities initially thought they had detected four bombs, but later clarified that only two were found.

Authorities had evacuated two hospitals and opened schools for residents who had to leave their homes.