Homegrown militants are increasingly carrying out fidayeen attacks on security personnel.
A few pamphlets of Popular Front of India and Social Democratic Party of India, both under the scanner of security agencies, have also been seized from the houses and workplaces of the accused persons
The cabinet of ministers approved a proposal by the acting justice minister, which will also see offenders fined one million rupees (USD 5,715), the government said in a statement.
The Muslim politicians also protested what they term the government's inability to ensure the safety of their community which constitute 9 per cent of the island's 21 million population.
The two-member team is in the Sri-Lankan capital to find out any possible links between the terrorist modules and the terrorists involved in the deadly Easter Sunday bombings in Sri-Lanka.
Military forces and police armed with assault rifles are patrolling the streets leading to churches and standing guard outside the compounds.
Sri Lankan radicals who had pledged allegiance to the Islamic State group have been blamed for the April 21 bombings against three Christian churches and three luxury hotels.
Muhammed Faizal Hameed aka Abu Marwan Al Hindi, said to be holed up in Qatar, is part of the 4-member IS module which planned suicide strikes in the state.