According to The Hindu: International Edition, "... the Eelam People's Revolutionary Liberation Front (EPRLF) is pursuing a lonely path, and has resolutely kept away from collaborating with the Government" (15 December, 1990). The article further adds that "The EPRLF's stand has led to increasing frictions with the Government and the EPRLF members are increasingly insecure in Colombo, where several of their lower ranking members have been arrested recently" (Ibid.).
For further information please find the attached newspaper articles:

The Hindu: International Edition, December 15 1990, Colombo Arming Non-LTTE to Fight LTTE, p. 5.

Sebastian, Rita, Sri Lanka: Tamil Rebels Call Off Ceasefire, Inter-Press Service, 25 January 1991.

Samath, Feizal, Clashes MAR Ceasefire in Sri Lanka But Truce Holds, Reuters, 3 January 1991.

Tamils, Muslims Reach Consensus on Sri Lanka`s North-East Merger, The Xinhua General Overseas News Service, 18 November 1990.

Sri Lankan Tamil Groups Want Homeguard Units to be Disbanded, Reuters, 24 September 1990.

TULF Leadership Back in Colombo for Revolution Talks, Kyodo News Service, 14 August 1990.

Sri Lankan Opposition Leader Invites Tamil Parties for Discussion, The Xinhua General Overseas News Service, 3 August 1990.

Sri Lankan: Resignation of Tamil MP`s Dashes Hopes for Peace, Inter Press Service, 24 July 1990.

De Silva, Dalton, Tamil Rebels Fighting With Indian Weapons, Reuters, 19 July 1990.

India: Sri Lankan Militants Disarmed and Moved, Inter Press Service, 21 June 1990.

Sri Lanka: Tigers Turn Blood Thirsty, Inter Press Service, 21 June 1990.

Sri Lanka: to Enact Law to Dissolve Controversial Council, Inter Press Service, 6 June 1990.