The National Bhikku Front said they organised the silent protest against what they called "communal clashes destroying national unity". Moderate Buddhist leaders have also denounced the riots concentrated in the central city of Kandy, 115 kilometres east of the capital Colombo.
Several Sri Lankan users also posted photos on Twitter of Buddhist monks visiting mosques during Friday prayers to express solidarity.
Sinhalese and Muslim civil society groups had staged a joint protest in Colombo yesterday calling for tough action against the perpetrators of the riots.
Sinhalese gangs set fire to mosques and Muslim-owned businesses, homes and vehicles in Kandy and elsewhere.
More From This Section
The government declared a state of emergency and imposed a curfew while troop reinforcements were used to back police patrols.
Police said the main instigator of the riots was arrested yesterday along with 145 others. He was identified as Amith Weerasinghe, a Sinhalese known for anti-Muslim activism and extremist social media posts.
Sri Lanka's majority Sinhalese community accounts for about three quarters of the 21 million population. Most are Buddhists. Muslims account for 10 percent of the population.