Golam Mostofa Ahmed, the Awami League lawmaker from Gaibandha, suffered serious head injuries in an accident on Dhaka-Tangail highway at Delduar yesterday afternoon.
Sources said the microbus he was travelling in collided head-on at Natiapara with a bus heading towards Bogra around 5:30pm when both the vehicles were overtaking other vehicles.
The collision also left three others in the car injured, said SM Mizanul Haque, officer-in-charge of Mirzapur Police Station.
The MP was first taken to the nearby Jamurki Health Complex and then to Tangail General Hospital, the OC said.
Doctors of Tangail General Hospital referred him to Dhaka Medical College Hospital, said Abdus Sobhan of the hospital.
Mostofa was not conscious, he said.
"The lawmaker might have had brain haemorrhage," the doctor said, adding that an ambulance carrying him left for Dhaka around 7:30pm.
The lawmaker's nephew Shahjahan, his personal secretary Ripon Miah and driver Manju Miah received treatment at Tangail General Hospital and they were all out of danger, he said, adding that two of them were released.
Awami League Lawmaker of Tangail-5 Sanwar Hossain, Deputy Commissioner Khan Mohammad Nurul Amin, and Superintendent of Tangail Police Mahbub Alam visited Mostofa at the hospital.
The DC said the lawmaker was being taken to the National Institute of Neuroscience and Hospital at Agargaon in Dhaka. He said the lawmaker was unconscious and in a critical condition.
"We have contacted doctors of the hospital in Dhaka and informed them of the treatment given to the MP at the Tangail hospital," he added.
Jahirul Islam, officer-in-charge of Delduar Police Station, said police seized the bus but its driver and helpers had fled.