Prosecutors close investigation of Berlin aquarium collapse as the cause remains unclear

BERLIN (AP) — Prosecutors in Berlin say they have closed their investigation into the spectacular collapse of a huge aquarium last December after an expert report failed to pin down a reason why the tank burst. The AquaDom aquarium, which stood in a hotel lobby, burst in the early hours of Dec. 16, sending 1 million liters (264,000 gallons) of water gushing into the building and the street outside. Two people were slightly injured. Prosecutors said Tuesday they have closed an investigation of persons unknown on suspicion of causing bodily harm by negligence after evaluating the expert report, released earlier this month. Its author presented three theories but said there was no clear evidence to prove any of them.