Four die in building collapse after explosion in Poland

A general view of a collapsed building is seen in Poznan, Poland, March 4, 2018 in this picture obtained from social media. Courtesy of INSTAGRAM/ @PAWEL_ALTERNATYWNA /via REUTERS

WARSAW (Reuters) - Four people died and about 20 were injured in an apartment building collapse in Poznan, western Poland, most likely to have been caused by a gas explosion, state-run news agency PAP said on Sunday.

The explosion on Sunday morning destroyed four of 18 apartments in the building, PAP said, quoting a local fire brigade representative.