The Interior Ministry of Tajikistan on Tuesday accused the Islamic Revival Party, banned as a terrorist organization in the Central Asian country, of organizing Sunday's attack which killed four foreign tourists and injured two.

The ministry said in a statement that the detained leader of the attackers, identified as Khussein Abdusamadov, confessed that the attack was ordered by Nosirhuzha Ubaidov. Ubaidov is an activist of the Islamic Revival Party also known as Kori-Nosir, who has been on the Tajik Interior Ministry's wanted list since 2015.

Abdusamadov said that he was trained to implement sabotage operations in 2014-2015 in Iran, where he joined the Islamic Revival Party.

He said that after committing the attack, he and other participants intended to cross the border to Afghanistan and join the ranks of terrorists.

According to the Tajik Interior Ministry, a car of an armed group on Sunday rammed into a group of seven foreign tourists traveling on bicycles on a highway in the southern Danghara district.

After that, the attackers snatched knives and axes and caused deadly injuries to four tourists, among whom two were U.S. citizens, one from the Netherlands and one from Switzerland. The attackers also wounded another two Swiss citizens.

One tourist in the group, a citizen of France, was not injured, the ministry said.

The attackers jumped into their car and fled, it said.

Law enforcement officers soon found the car with the help of local citizens in a nearby village, and detained Abdusamadov.

Two other members of the group showed resistance, injuring a policeman. One of them was killed and the other was seriously wounded and taken to a hospital.

The police also detained four local residents on suspicion of being accomplices of the attackers, the ministry said.

The investigation will continue under direct supervision of Tajik President Emomali Rahmon, according to the ministry.