German authorities on Sunday had to disarm an unexploded 1,100-pound World War II bomb that turned up at a construction site in a trendy Frankfurt neighborhood.

Authorities said 13,000 residents were evacuated and mass transit was halted in the city’s chic Gallus district Sunday for the dismantling of the bomb, which was found by construction crews on Thursday.

Explosives experts were able to dismantle the massive device in about two hours.

Trains were running again by Sunday evening, German rail company Deutsche Bahn said.

Although alarming, the discovery of unexploded devices is not too uncommon in German, even 75 years after the war ended.