Tel Aviv stocks erased early losses and ended higher on Sunday in the first trading session since the start of a wave of missile strikes between Israel and Iran on Friday, as Israel and its economy attempt to remain as open as possible.

The Israeli military, in a social media post, warned Iranians to evacuate arms factories, signaling what could be a further widening of the campaign.

Israel and Iran kept up their attacks, killing and wounding civilians and raising concern among world leaders meeting in Canada this week that the biggest battle between the two old enemies could lead to a broader regional conflict.

Onlookers gathered on Saturday at a central Tel Aviv residential building next door to Israel’s defense headquarters that was damaged after it took a hit from what appeared to be shrapnel from an overnight missile barrage from Iran.

Israeli citizens were ordered to head to bomb shelters on Friday night amid retaliatory missile strikes from Iran.

Delta Air Lines Inc. and United Airlines Holdings Inc. suspended flights to Tel Aviv following Israel’s bombing of Iran and the closure of Israel’s airspace.