Russia carried out its largest air strike on Ukraine's energy system since its invasion in February 2022, damaging power units at a dam and causing blackouts for more than a million people
The accidents were mainly due to drunken driving and speeding, police spokesperson S.P. Ruwan Gunasekara told Xinhua news agency.
Over 515 drivers were also arrested for drunken driving from various districts during the period.
Security had been tightened across the country since April 12 to nab drunk and speeding drivers.
Sri Lanka celebrated its traditional New Year over the weekend, in what is considered the longest holiday in the island country.