Islamic State carried out an attack on Egyptian security forces in Sinai a week ago and captured a Christian criminal research expert, the militant group said

The man was involved in the government’s campaign against militants, the group said in its weekly newspaper al-Naba, published on Thursday. It gave no further details.

The attack took place on Jan. 18, west of al-Arish, the capital of the North Sinai province, the group said. One Egyptian officer was killed and two soldiers injured, it said, adding several Egyptian soldiers had been killed or wounded in the past week.

Two security sources in northern Sinai confirmed the incident, saying three security personnel were killed. The Christian man was riding a bus when he was captured, they said.

On Tuesday, the military said Egyptian security forces had killed 59 militants in the Sinai peninsula recently and had lost seven of their own men.

The figures covered the “last period”, the military said without specifying dates or locations of operations. It did not give the identity of suspects or their affiliation.

Egypt’s military says several hundred militants have been killed since it launched a major campaign in February last year to defeat militants linked to Islamic State in Sinai.

Gunmen attacked security forces near St. Catherine’s Monastery in Egypt’s south Sinai on Tuesday, killing at least one police officer and injuring four others, the Health Ministry said, just a week after two deadly church bombings killed 45.

Islamic State claimed responsibility for the attack on a police checkpoint several hundred metres (yards) from the entrance to the monastery, one of the world’s most important Christian sites.

The attack comes just 10 days before Pope Francis is scheduled to visit Egypt and just over a week after two deadly suicide bombings on Christian churches, also claimed by Islamic State, plunged the country into mourning and marked one of the bloodiest days for the country’s Christian minority in decades.     

St. Catherine’s, founded in the 6th century and located at the foot of Mount Sinai, is one of the oldest Christian monasteries in the world and a UNESCO world heritage site. It is part of the Eastern Orthodox church.

Egypt’s Christian minority, which makes up about 10 percent of the country’s 92 million people, has increasingly been targeted by Islamist militants, with three deadly church attacks in the span of four months.

In February, scores of Christian families and students fled North Sinai province after a spate of targeted killings.

A successful assault on St. Catherine’s would be the latest challenge to President Abdel Fattah al-Sisi, who has pledged to protect the religious minority as part of his campaign against extremism.

Egypt has for years been battling an Islamist insurgency in the rugged and thinly populated northern Sinai, which gained pace after the military overthrew President Mohamed Mursi of the Muslim Brotherhood in 2013 following mass protests against his rule.

Attacks in Egypt’s southern Sinai, a popular destination for  tourists dotted with Red Sea resorts, are by contrast rare.

Israel took the unusual step earlier this month of barring its citizens from crossing into the Sinai peninsula, saying the threat of attacks in the area inspired by Islamic State and other jihadi groups was high.