Military chiefs are expected to gather in the Saudi capital on Wednesday to assess the battle against Islamic State militants, diplomatic sources said.
The two-day meeting, a follow-up to earlier talks, will gather "all the countries that are involved" in the US-led fight against IS, including Persian Gulf Arab nations, one of the sources said, AFP reported.
A diplomatic source said the meeting is "more an exchange of information" and a chance for coordination, rather than a forum for major decisions.
The talks among defense chiefs and their deputies coincide with the rise of IS in Libya, which has heightened concerns in the region after the group seized parts of Iraq and Syria last year.
Arab states have intensified their bombing of IS targets since the militants in early February burned alive a Jordanian fighter pilot whose plane went down over Syria last year.
Jordan's information minister on Monday said Bahrain had deployed fighter jets in the kingdom to support the anti-IS air campaign.
Also Monday, the state news agency in the UAE said its Jordanian-based warplanes hit oil refineries run by the militants.
The same day, Egypt carried out its first announced military action against IS in Libya, after the militants released a video showing the beheading of 21 Egyptian Coptic Christians.
