Qatar said on Sunday that it had received an invitation from Saudi Arabia to attend emergency regional talks to discuss mounting tensions between Iran and the United States.

Riyadh had called two gatherings — one for Arab League members, the other for Gulf Cooperation Council (GCC) regional bloc nations — after a spate of attacks.

Several tankers in Gulf waters were targeted under mysterious circumstances and a Saudi crude pipeline was hit by drone strikes coordinated by Yemen rebels who Riyadh said were acting on Iranian orders.

King Salman had invited Gulf leaders and Arab League members to summits in Makkah on May 30 but it was not stated if Qatar was also invited to the Arab bloc deliberations.

Read: Saudi Arabia calls urgent Gulf, Arab League meetings over tensions

It was unclear if Qatar — subject to a Saudi-led economic and diplomatic boycott over alleged support for Iran and militant movements — would be invited at all, with Doha initially reporting it had not received an invite.

The Kingdom of Saudi Arabia (KSA), the UAE, Bahrain and Egypt have imposed an economic and diplomatic boycott on Qatar since June 2017 over allegations that Doha supports terrorism and is cosying up to regional foe Iran. Qatar denies the charges.

Qatar's emir "has received a written message" inviting the government to join the crisis talks, the government's information office said in a statement.

The invitation was received by Foreign Minister Mohammed bin Abdulrahman Al-Thani during a meeting with the secretary general of the GCC, it added.

Al-Thani has previously called for a "dialogue" between Iran and the United States to resolve the crisis between their countries.