The police has begun a probe into the arson that took place at the State Transport Corporation (STC) yard in Ho, Volta region on Tuesday dawn by a separatist group.

According to the police, at about 02:00 am, four armed men, stormed the Ho STC yard demanding the keys to all the vehicles parked and set two of the minibuses ablaze when the drivers did not produce the keys.

The arrival of police and fire service personnel saved the situation.

The police says its preliminary investigation shows that there were eleven vehicles parked at the time of the attack.

One bus was completely burnt and another slightly burnt.

A flag of the group, which calls itself "Western Togoland", was found at the scene, the police noted in a statement.

The security agency has urged the public to remain calm and volunteer information for the arrest of the perpetrators.

There are several separatist groups in the Volta region advocating independence.

They say the Volta Region of Ghana is independent and autonomous Western Togoland.

It is unclear which of the groups attacks the transport yard.