HAVANA (AP) — Lightning struck a crude oil storage tank in the city of Matanzas, causing a spreading fire that led to four explosions which injured nearly 80 people and left 17 firefighters missing, Cuban authorities said Saturday.

Firefighters and other specialists were still trying to quell the blaze at the Matanzas Supertanker Base, which began during a thunderstorm Friday night, the Ministry of Energy and Mines tweeted.

The official Cuban News Agency said the lightning strike set one tank on fire and the blaze later spread to a second tank.

The Facebook page of the provincial government of...