Israel and Iran launched fresh attacks on each other overnight into Sunday, as U.S. President Donald Trump said the conflict could be easily ended while warning Tehran not to strike any U.S. targets.

Separately in the city’s south, Shahr Rey, one of the country’s largest oil refineries, was also struck, according to Iranian state news media. Emergency crews were trying to contain the fire, and a resident of Tehran, Reza Salehi, said he could see the flames from miles away.

Iran's oil ministry said late Saturday that Israel has struck the Shahran oil depot in western Tehran—one of the capital’s key fuel sites. A second depot in southern Tehran was also hit, it said in a statement.