The mishap occurred this afternoon on the Manmad-Malegaon road, an official of Chandvad police station said.
All five members of the Chitalkar family were travelling on a motorcycle to Boygaon when the accident took place. While three persons were killed on the spot, another one died in the hospital, the official said, adding the tanker's driver was apprehended.
The deceased have been identified as Santosh Chitalkar, Asha Chitalkar, Savita Chitalkar and Bhooshan Chitalkar, he said.
A case under relevant sections of the Indian Penal Code was registered, he said, adding a probe was on.
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