RIYADH — Saudi Arabia has arrested three suspects in connection with the shooting of a Danish man in Riyadh last month, and investigations show it was carried out on behalf of “Islamic State”, an interior ministry spokesman said on Thursday.

The spokesman, Major General Mansour Turki, said security forces recovered the handgun and a vehicle used in the Nov. 22 attack, which the victim survived.

“The confessions and the results of the initial investigations showed that they carried out the crime in support and sympathy with Islamic State,” he said.

The attackers had trained for the assault, Turki said. “The training was simple… They chose a desert area … and wanted to make sure that the person had enough courage to use the gun.”

The three suspects include two brothers, who met the third person over social media, the ministry said.

A group of supporters of IS released a video said to show its members carrying out the shooting. The video, filmed from inside a vehicle driving along a street with Riyadh neighborhood signposts, shows a handgun being fired through an open window at a white car traveling in the same direction.

IS last month urged supporters in Saudi Arabia to attack Shi’a government officials and Westerners.