Hamasinfo-icon expressed shock on Wednesday over Saudi Arabiainfo-icon's demand that Qatarinfo-icon end its support for the Palestinianinfo-icon Islamist movement as tensions flared between Gulf Arab states.

Saudi Arabia and its allies cut off ties with Qatar on Monday after accusing the gas-rich state of supporting extremism across the region.

On Tuesday, Saudi Foreign Minister Adel Al-Jubeir said that to rebuild relations, Dohainfo-icon must cut its support for "extremist" groups, including Hamas.He said Qatar-supported Hamas, which runs the Gaza Stripinfo-icon, "undermines the Palestinian Authority."

In a statement on its website, Hamas said the party felt "deep regret and disapproval" at the Saudi statement.

"These statements are a shock to our Palestinian people and to our Arab and Islamic nation, which considers the Palestinian cause its central cause," the statement said.

Hamas swept Palestinian parliamentary electionsinfo-icon in 2006 but remains blacklisted as a terrorist group by the European Unioninfo-icon and the United Statesinfo-icon.

The Islamist movement seized Gazainfo-icon in a near civil warinfo-icon with forces loyal to Palestinian president Mahmud Abbas in 2007. The two factions have been at loggerheads ever since.Hamas has fought three wars with Israelinfo-icon since 2008, and the Jewish state enforces a crippling blockade on Gaza.

Qatar has provided tens of millions of dollars for the reconstructioninfo-icon of Gaza since the last conflictinfo-icon with Israel in 2014.