Three people were killed as a microbus plunged into a roadside ditch at Jangalia on Chittagong-Cox's Bazar highway in Lohagara upazila of Chattogram.
The identities of the victims could not be known immediately.
Feroz Khan, a senior officer of Lohagara Fire Service, said the microbus lost control and fell into the ditch around 9 am, leaving seven people injured.
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The injured were rushed to a hospital where doctors declared three people dead.
The deceased included two Buddhist monks.
Four injured victims are undergoing treatment at the hospital.