ISLAMABAD Adviser to Prime Minister on Interior Rehman Malik said on Monday that the banned militant outfit Lashkar-e-Jhangvi was involved in blast on Islamabad's Marriott hotel on September 20.

The interior ministry official was presenting a report on the findings of the blast in a session of the National Assembly today.

'The entire matter has been solved... Basically it was assisted by Lashkar-e-Jhangvi,' Malik told federal lawmakers in parliament.

Malik said two teenage boys had been arrested in Toba Tek Singh in connection with the attack, which was carried out by a suicide bomber in a dump truck packed with 600 kilograms of high explosives.

'The car which was used, the dumper which was used - we have full information about it,' Malik said, explaining that the truck bomb was prepared in Jhang and then driven into the capital.

'We have got the details of telephone calls. Two boys who assisted were arrested.'

Malik said the banned militant organisation was involved in planning the attack and that the truck used by the attackers was 'loaded with ammunition in Jhang.'

The truck entered Islamabad through Rawat, a town near Murree, he added.

Malik said a complete report had been prepared based on the investigations carried out after the attack and will be presented to the parliament soon.

Four men had already been remanded in custody pending trial.

No one has claimed responsibility for the September 20 attack, which killed at least 60 people and wounded more than 260.