They are angry and grief-stricken, but Saudi Arabia's minority Shias refused on Sunday to be provoked by a deadly mosque bombing that authorities called an attempt to promote sectarian strife.
The interior ministry confirmed the identity of the suicide bomber who blew himself up inside a Shia mosque in Eastern Province on Friday, killing 21, and said he had links with the Islamic State jihadist group.
It was the deadliest attack in years to strike the Sunni-dominated kingdom, and marked the first time IS had claimed an attack in Saudi Arabia.
"No, no, no... There is no action" in the form of retaliation, a Shia resident who said he lost three friends in the attack on Kudeih village told AFP.
"They just want justice."
Naseema Assada, a resident of Shia-majority Qatif city near the stricken village, said she visited seven families whose loved ones died in the bombing.
"They are angry at Daesh and radical Sunnis," but not at Sunnis in general, she said, using an Arabic acronym for IS.
Residents said two children were among the dead, and plans were being made for a mass burial.
Demonstrators took to the streets of the region on Saturday to denounce the attack, which residents said occurred despite security checkpoints in Qatif.
"This is strange," Assada said. "The government should protect people and if it's not, this is the government's fault."
In a statement carried by the official Saudi Press Agency late Saturday, the interior ministry identified the bomber as Salih bin Abdulrahman Salih al-Ghishaami, a Saudi national.
"He was wanted by security services for belonging to a terrorist cell receiving directions from Daesh abroad," the ministry said.
The militant group had already claimed Friday's attack but identified the bomber as Abu Amer al-Najdi.
"The cell was discovered last month, and so far 26 of its members, all Saudi nationals, have been arrested," the interior ministry said, raising the number of wounded from 81 to 101.
It is the second mass killing of Shias in the kingdom since late last year.
In November, gunmen killed seven Shias in the Eastern Province town of Al-Dalwa. Authorities said the suspects were linked to IS.
Although Sunni extremists attacked Westerners and government targets in Saudi Arabia between 2003 and 2007, the Al-Dalwa shootings were the first major militant assault against Shias.
There was no violent Shia backlash against that attack.
The IS group, which considers Shias heretics, has declared a "caliphate" in parts of Iraq and Syria it controls. It has claimed numerous atrocities including the beheading of foreign hostages.
Saudi Arabia and its Sunni Gulf neighbours last year joined a US-led military coalition bombing IS in Syria, raising concerns about possible retaliation in the kingdom.
Since late March, Saudi Arabia has also led a coalition bombing Iran-backed Shia rebels who seized large parts of Yemen and have sent deadly shell fire into Saudi Arabia.
Political and religious leaders in the kingdom, and its media, were unanimous in denouncing the mosque bombing.
The interior ministry said the attack against "honourable citizens was carried out by tools controlled by foreign forces that aim to divide the unity of society and pull it into sectarian strife".
Saudi Arabia's top cleric, Grand Mufti Sheikh Abdul Aziz al-Sheikh, called it a "criminal act" which targeted national unity.
But columnist Khaled Almaeena, writing in Sunday's Saudi Gazette, complained that "some imams spewed hatred and spread falsehood about Muslims of other sects.... we should not have remained silent."
The United Nations Security Council and Saudi Arabia's regional Shia rival Iran also condemned the mosque attack.
Most of the kingdom's Shias live in the east, where the vast majority of the kingdom's oil reserves lie but where Shias have long complained of marginalisation.
The Qatif attack occurred despite the arrest since December of nearly 100 suspected jihadists, most of them allegedly linked to IS.
The interior ministry said five members of the suicide bomber's 26-member cell were involved in the May 8 shooting of a policeman on patrol in southern Riyadh.
Investigators recovered firearms and 230 kilogrammes (507 pounds) of chemicals used for making explosives.
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