Brussels, March 24 (IANS): Belgium will launch an investigation into the circumstances behind last week's terrorist attack in Tunisia that killed 23 people, including 20 foreign tourists, and injured around 40, Xinhua reported citing Belgian media on Monday.

The Islamic State (IS) terrorist group claimed responsibility for Wednesday's attack on the Bardo museum, located within Tunisia's parliament complex, in capital Tunis.

According to Belgian media reports over the weekend, one of those suspected of taking part in the attack was believed to have recently been in Belgium. The country has one of the highest number of nationals travelling abroad to join the IS.

A 61 year-old Belgian woman was among the people killed in the attack, while her 62-year-old husband was seriously injured.

The Belgian federal prosecutor confirmed on Monday that an investigation would be launched into the possibility of a Belgian link to the crime.

Two of the three attackers involved were subsequently killed by the police. The third is still at large.

Tunisian Prime Minister, Habib Essid, announced on Monday that six police chiefs, including those of Tunis and the Bardo Museum, had been dismissed following the attacks.

A spokesman for the Prime Minister said that "shortcomings" in policing and security were to blame for the toll. He said that a monument to honour the dead would be erected shortly.