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The Minister noted that all seven suicide bombers were citizens of Sri Lanka.
"The local executive group is suspected of participating in an international network," said Senaratne.
As a result of a series of explosions that occurred in hotels and churches of Sri Lanka on April 21, at least 290 people were killed, hundreds were injured.
According to the latest data, the police of Sri Lanka detained 24 people in connection with the explosions.