Qatar said on Monday it reserves the right to respond directly and under international law after Iran targeted the Al Udeid U.S. military base in Doha in response to a U.S. attack on Iranian nuclear facilities.

Iran confirmed it launched attack on US forces at Qatar’s Al Udeid Air Base. Qatar had earlier closed airspace following US attacks on Iran.

Flares were visible over Qatar’s capital, Doha Monday, explosions were also heard.