The police are probing possible links between today's serial blasts in suburban trains, which killed more than 100 people, and the seizure of radio-enabled detonators in March and a huge consignment of RDX at Aurangabad in May.

The Anti-Terrorist Squad of Mumbai police busted two suspected modules of the Lashkar-e-Tayiba following the seizures, but said it had been unable to find out whether similar modules were still active in the city and if they had plans to carry out attacks.

The police are now focussing on finding out if the persons arrested in connection with the two modules had any knowledge of today's terror attacks in suburban trains, sources said.

The ATS had earlier claimed the arrests made by it had helped avert a major terrorist attack on Mumbai.

On May 9, ATS sleuths seized a consignment of 30 kg of RDX explosives and arms and arrested over 10 suspected Lashkar operatives at Aurangabad in Marathwada region, 350 km from Mumbai. The consignment included 10 AK-47 assault rifles and 2,000 cartridges. Subsequently, seven more persons were arrested and 13 kg of RDX and six AK-47 rifles were seized from different locations in central and northern Maharashtra.

On January 13, the ATS arrested Maulana Ghulam [Images] Yahya, the imam of Haj House masjid on the charge of harbouring three militants from Jammu and Kashmir [Images] with links to the Lashker-e-Tayiba. The ATS alleged that the imam was a link between Salauddin, the Lashkar commander in Kashmir, and the three arrested militants -- Mohammed Ramzan Abdul Wahab Haji, Kurshid Ahmed Abdul Gani Lone and Arshad Hussain Badru Hussain.