Tunisia: 12 people detained in probe into tourist attack that killed 38

Kamel Jendoubi, Minister to the Prime Minister in charge of Relations with Constitutional Bodies and the Civil Society, right, gestures during a press conference in Tunis, Tunisia, Thursday, July 2, 2015. The Islamic State group claimed responsibility for the attack, in which a Tunisian student opened fire on a beach in the resort of Sousse. The attacker was later killed by police. (AP Photo/Darko Vojinovic) (The Associated Press)

Hearses carry British victims of the Tunisia beach attack after a plane repatriating their remains landed at the RAF (Royal Air Force) Brize Norton base in Brize Norton, England, Wednesday, July 1, 2015. Britain on Wednesday began repatriating the remains of victims of last week's terror attack at a Tunisian beach resort. (AP Photo/Matt Dunham) (The Associated Press)

TUNIS, Tunisia – A Tunisian official says that about 12 people have been detained in the investigation into a massacre at a beach resort that killed 38 people, mostly British tourists.

Tunisia's Radio Mosaique reported Thursday that Lazhar Akremi, a senior official with the ruling Nida Tounes party, made the announcement at a party meeting. The report did not elaborate on when or where the arrests occurred.

The Tunisian government is holding a news conference Thursday morning in the capital Tunis about the investigation into Friday's attack. The Islamic State group claimed responsibility for the attack, in which a Tunisian student opened fire on a beach in the resort of Sousse. The attacker was later killed by police.

At least 27 Britons and other European tourists are confirmed among the dead.