The deceased were identified as Piash, 2, Alim, 32, assistant sub-inspector and driver of the vehicle of Rab and Afroza Begum, 35.
Commanding officer of Patuakhali Rab Squadron leader Md Rashedul Islam, said a picnic bus of Rab carrying 13 people was heading towards Kuakata from Barishal.
The accident occurred around 8:30 pm when the bus of ‘Dhansiri Paribahan’ from Kuakata collided head-on with the picnic bus of Rab, killing one child and 52 others injured, said Md Imtiaz, officer-in-charge of Sadar Police Station.
Among the injured, the driver of the Rab vehicle and the woman died on the way to Barishal hospital.
Thirty-four injured people were sent to Patuakhali Medical College and Hospital while 15 others were taken to Lebukhali Combined Military Hospital for treatment.
Five severely injured victims were sent to Barishal Shere-e-Bangla Medical College and Hospital.
On information, police, Rab, Bangladesh Army and local fire service men rushed to the spot to rescue the victims.
Additional superintendent of Patuakhali Police Sajedul Islam said a severe traffic jam was created on both sides of Patuakhali-Kuakata highway after the accident, reports UNB.