In last night's attack, a showroom of the Fashion Bug clothing chain in Pepiliyana, a suburb of Sri Lankan capital Colombo, was stoned ans the glasses were smashed before the merchandise was set on fire.
Several people were injured and several other vehicles and buildings sustained damages, local media reports said.
Bodu Bala Sena (Buddhist Force), however, today denied any involvement in the violence and termed it as a systematic attack to discredit them.
The police and the elite Special Task Force (STF) had reportedly brought the situation under control now.
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The suspicions were directed at BBS after they recently stirred up an anti-Muslim campaign and forced Muslim clerics to withdraw "halal" certification from food sold in the local market, saying it was offensive to the majority non-Muslim population.
Muslims comprise less than 10 per cent of Sri Lanka's 20 million population where the majority are Sinhalese Buddhist.
He said he would urge the police to arrest the culprits responsible for the cloth store attack.
"We don't want another communal clash in the country".
The attack and a persistent BBS campaign against Muslims have caused wide spread Muslim fears.
As part of the campaign to prevail on the majority Sinhalese to boycott Muslim businesses, the Buddhist Force in January had attempted to storm a Muslim-owned department store.
The Council of Muslims early this month wrote to President Mahinda Rajapaksa for protection.