Arjuna Ranatunga was arrested on Monday for the first violent incident amidst the on going political crisis in the country.
"He was arrested early this morning for drinking and driving after the vehicle driven by him hit a three wheeler and injured its driver," police spokesman Ruwan Gunasekera told Reuters.
The details of the attackers and their relatives linked to the bombings was released by the police on Wednesday.
The curfew was imposed on Sunday after a group of miscreants carrying swords attacked some people travelling on a three-wheeler in Porathota area of the town. The vehicle was set on fire.
Sri Lanka Cricket, currently fighting the menace of deep-rooted corruption, was dealt a blow after its Chief Financial Officer was arrested for alleged financial fraud, police said on Monday.
The security forces continue their hunt for members of the local terror group National Thowheeth Jamath which was behind the deadly Easter Sunday bombings in which 253 people were killed and over 500 injured.
Arson attacks continued on Wednesday and Muslim-owned businesses were targeted by the mobs.
The National Tawheed Jamath is suspected of plotting the deadly Easter blasts.
Polls opened at 7 am local time and would close at 5 pm with some 12,845 polling stations being set up throughout the country for 15.9 million voters, who will choose a successor to President Maithripala Sirisina.
'What happened last Sunday is a great tragedy, an insult to humanity'
Forty suspects, including the driver of a van allegedly used by the suicide bombers, have been arrested in connection with the attacks which shook Sri Lanka.
-- Seven suicide bombers believed to be members of an Islamist extremist group carried out the series of explosions. -- Police have so far arrested 24 people - mostly members of an Islamist extremist group - in connection with the blasts
Seven persons had been arrested in connection with the blasts.
Authorities also released photographs of six suspects, including three women, wanted for their involvement in the attacks and sought information regarding them from the public.