Talks toward a cease-fire between Israel and Hamas in the Gaza Strip were continuing Monday despite Israel and the Lebanese militant group Hezbollah exchanging strikes Sunday and Monday, White House national security spokesman John Kirby said.

“There was not an impact on the talks in Cairo,” Kirby said.

The United States, Egypt and Qatar are mediating the negotiations in Cairo, where delegates from Israel and Hamas have also been in attendance, Kirby said.

A fourth day of talks ended Sunday without a deal. Middle East envoy Brett McGurk was leading negotiations for the U.S. again Monday, but he is expected to depart Egypt soon, leaving a working group behind to try to broker an deal, Kirby said.

The White House spokesman said it “remains to be seen” how long the negotiations will last but added that he expects them to continue at least a few more days.

Kirby said the talks have grown more detailed in nature in recent days. Gaps remain in a framework agreement reached between Israel and Hamas in principle in May that would end fighting in Gaza and release Israeli hostages from Hamas custody. Among the sticking points, according to multiple reports, is that Israel is demanding it retain a military presence along Gaza’s border with Egypt. 

“There continues to be progress, and our team on the ground continues to describe the talks as constructive,” Kirby said.

Israel and Hezbollah appeared to be on the verge of an all-out war Sunday when they exchanged heavy fire. Israel said around 100 warplanes launched airstrikes targeting thousands of rocket launchers across southern Lebanon to thwart an imminent Hezbollah attack. Hezbollah said it launched hundreds of rockets and drones aimed at military bases and missile defense positions in northern Israel and the Israeli-annexed Golan Heights.

The Israeli strikes killed three militants in Lebanon, and Israel’s military said a soldier was killed by either an interceptor of incoming fire or shrapnel from one. It was all over by mid-morning Sunday, and the rest of the day and night passed without incident.

However, the short-lived calm ended Monday afternoon when Israel struck the Lebanese border village of Tair Harfa and an area of the coastal city of Sidon, according to Lebanese state media and witnesses. Later Monday afternoon, Hezbollah announced that it had targeted military surveillance equipment in northern Israel with an exploding drone.

The Associated Press contributed to this report.