The owner and a publicity officer of a private event organising company, which organised the party at a hotel in Wadduwa in which four persons died, were arrested by the Police yesterday.
Thousands of youths had participated in a party at the premises of a popular hotel in Wadduwa beach allegedly organized by an advertising firm in Kaduwela on August 4.
The party had been reportedly organized for a group Facebook members.
Four individuals admitted to the Panadura Hospital after becoming seriously ill at the party had later died.