Eyewitnesses said the car appeared to have lost control and rammed the divider, leaving the four injured, one of them critically, according to the police.
A doctor who was passing from the accident spot helped the boys -- all aged between 18 and 19 -- and also alerted the police, an official said.
The teenagers are suspected to have been in an inebriated condition when the accident occurred, he said, adding the police have seized their car and recovered beer bottles from it.
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