Thousands of people were fleeing Tehran on Wednesday after Israeli warplanes bombed the city overnight, and a source said U.S. President Donald Trump was considering options that include joining Israel in attacking Iranian nuclear sites.

The Israeli military said an entire Tehran neighborhood should evacuate ahead of planned strikes there, as residents of Iran’s capital piled onto roads heading north to seek shelter from the fourth day of bombardment.

Some head for Turkish border with the hope of staying there until conflict dies down, while others make the long drive to a quieter province further north