April 4 (UPI) — Israel’s military suspended attacks in an area of Iran where a U.S. airman is believed to be lost as U.S. forces carried out a second day of search-and-rescue operations Saturday.

The service member was one of two pilots on board an F-15E fighter jet that Iran shot down over its airspace on Friday. U.S. officials were able to safely rescue one of the pilots, but the second was missing.

An unnamed Israeli official told The New York Times that the Israeli military halted its operations in the area — the mountainous regions of Kohgiluyeh, Boyer-Ahmad and Khuzestan provinces — amid the search. The official said it was also sharing information with U.S. officials to aid in the rescue mission.

Meanwhile, state-run media in Iran encouraged civilians in the region to also look for the missing U.S. airman, The Guardian reported.

Speaking Friday with NBC News, President Donald Trump said the downed U.S. fighter jet won’t affect the United States’ negotiations with Iran more than a month after U.S. and Israeli forces began strikes on the country.

“No, not at all,” Trump said of the possibility. “No, it’s war. We’re in war.”

A U.S. official told NBC News that it’s believed that the downed F-14E fighter jet was originally based out of Royal Air Force Lakenheath in Britain.

Elsewhere, Iraq closed its border crossing with Iran at Shalamja on Saturday after an Iranian missile strike at the site killed one person and injured five others. Lt. Gen. Omar al-Waeli, who heads the Border Ports Authority, said the injured were injured were taken to a hospital in Iran.

All trade and passenger traffic were halted, the Iraqi News Agency reported.

“There are alternatives to Shalamja crossing, regarding the entry of goods, such as the Safwan border crossing, in addition to the existence of other land crossings operating in the rest of the govern orates in order to secure the entry of goods and commodities,” al-Waeli said.