Shooting in Istanbul: One person was killed after masked gunmen attacked a church in Turkey

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At least 47 suspects have been arrested in connection with Sunday's church attack in Istanbul, according to Turkey's official Anadolu news agency, citing Turkish Interior Minister Ali Yerlikaya.

One person was killed in the attack, which saw masked gunmen open fire during Sunday mass at Santa Maria Church, according to Yerlikaya. The incident occurred in the Buyukdir neighborhood at around 11:40 a.m. local time (3:40 EST), Yerlikaya added in a post on X.

According to Istanbul Governor Davut Gul, no other people were injured in the attack.

ISIS claimed responsibility for the shooting, according to a statement by the organization's Amaq news agency, quoting a security source in the organization.

Anadolu also reported that two of the detained suspects were believed to belong to ISIS, describing one as being from Tajikistan and the other from Russia, citing the Turkish Interior Minister.

In a video posted on social media, Turkish President Recep Tayyip Erdogan said that following the attack, Turkish security forces were mobilized “with all their resources.” The Turkish leader was also seen on board a plane making a phone call with a priest from the targeted church.

The country's deputy chief prosecutor and two other prosecutors are investigating the incident, according to Turkish Justice Minister Yilmaz Tun.

“The investigation is being conducted in a multifaceted and meticulous manner,” Tonk said.

This is a developing story and will be updated.

CNN's Iyad Kurdi contributed reporting.