Balasore: At least twenty persons sustained injured when two buses collided head on in Balasore town today morning. According to reports, the incident occurred on the Tamulwa Bridge. While the private bus Ajay was going from Balasore to Baripada, the other private bus Aurobindo was heading from Bhubaneswar to Balasore. On getting information, police reached the spot immediately and shifted the injured persons to District Headquarter Hospital immediately.