Manslaughter was the most serious potential charge in the case and was being investigated, Thoemmes said. Detectives will study how the fireworks were acquired and will ask the U.S. Bureau of Alcohol, Tobacco, Firearms and Explosives for help with that part of the investigation, she said. ????? ???????  

All six suspects were arrested on allegations of first-degree reckless endangering, first-degree endangering the welfare of a minor and multiple fireworks offenses. The first two suspects have been released pending investigation. ????????????  

The explosion killed three women, one man and a 3-year-old boy and injured about 20 others. The tragedy occurred when a lit bundle of mortar-style aerials tipped over and shot into crates of unlit fireworks, causing a rapid-fire series of blasts. ?????  

Police were working with prosecutors to file charges but it is taking time due to the number of people arrested, large volume of evidence being examined and fireworks being tested, she said. ????? ???????  

Police arrested two couples on Wednesday and one couple last Friday, said Honolulu police homicide Lt. Deena Thoemmes said. Police expect to arrest more people, she said. ????????????