The detonators were discovered on Monday at a private bus stand located in the Pettah neighborhood of Colombo, police said. The officers initially found just a dozen of devices, but later retrieved 75 more while clearing the garbage heap.
Police launched an investigation into the incident. It is unclear whether the devices had anything to do with the multiple coordinated bombings which took place on Easter Sunday.
A total of 24 people were arrested in connection with the attacks, but no group has claimed responsibility so far. Some government officials said that the perpetrators were local Islamist extremists aided by international groups.Suicide bombers set off explosives in several hotels and Catholic churches across the country, killing 290 and injuring hundreds more. An apartment complex was also hit. Another bomb was later discovered near the Colombo International Airport and successfully defused.