UNP Western provincial council member Mujibar Rahuman told Sri Lanka Mirror that the attack has taken place amidst the evening prayer.
A few has been hospitalized who got injured at the clash and the security forces have laid heavy guard to the area.
Colombo General hospital sources say that 2 policemen and a civilian who got injured from a clash in Grand Pass has been admitted to the hospital.
A spokesperson in Bodu Bala Sena said that the BBS has no involvement in the incident.
According to eyewitnesses about 10 Buddhist monks suspected to be from the Ravana Balaya group, allegedly attacked the mosque despite the police guard.
The area remains tense after a few houses were also attacked on the Swarna Chaitya road in Grandpass where the mosque is situated.
The attack took place soon after Maghrib or evening prayers, sources told Colombo Telegraph.
The Ravana Balaya group called for its relocation within one month. Security forces personnel have now been stationed around the mosque to assist the police to keep calm.
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