Three security officers also suffered minor injuries as they raided the “hideout” in a residential neighbourhood on Wednesday, the official Saudi Press Agency said citing a security spokesman.

The Saudi men were wanted for “terror incidents in Qatif” in the kingdom’s Eastern Province, the spokesman added without offering details.

“No other resident of the building or passersby were hurt due to the intensive firing from inside the place towards the street,” he said.

Saudi Arabia’s Eastern Province has seen bouts of unrest since 2011 when protesters emboldened by the Arab Spring took to the streets demanding an end to what they say is discrimination by the Sunni-dominated government.

The Shia community is estimated to make up between 10% and 15% of the kingdom’s population of 32 million, but the government has released no official statistics.

The government denies discrimination against Shiites.

The region was also home to Nimr al-Nimr, a fiery Shia cleric and government critic who was executed in 2016 on terrorism charges, sparking widespread outrage and leading to renewed tensions with regional rival Iran.