CAIRO (AP) — Four Arab nations seeking to isolate Qatar over its alleged support for extremist groups were angered Wednesday by what they said was a "negative" response by the tiny Gulf nation to their demands for ending the crisis roiling the region.

Doha's response, they said, was "not serious" and betrayed Qatar's "failure" to realize the gravity of the situation.

The announcement followed a meeting by foreign ministers from the four nations — Saudi Arabia, Egypt, the United Arab Emirates and Bahrain — in Cairo, shortly after they said they had received Doha's reply.

The four accuse Qatar o...