PHUKET: Up to 700 police and Army reinforcements from neighboring provinces were being called to Phuket tonight as about 500 protesters surrounded a police station and drunks talked about setting fire to it.

The Police Commander of Region 8 - the headquarters recently moved from Nakkon Si Thammarat to Phuket - told Phuketwan tonight that hundreds of police commandos and Army from the neighboring provinces of Phang Nga and Krabi would be trucked to the scene before midnight.

''There are serious threats to the safety of people so we hope to have hundreds of police and Army soldiers on the spot shortly,'' said Lt General Tesa Siriwato.

Instead of the protest over the needless deaths of two young men earlier in the day being dealt with quickly, Phuket officials allowed a crowd outside Thalang Police Station in central Phuket to grow, and eventually the gathering became so large that the main road leading to Phuket International Airport became blocked.

Photographs sent from inside the police station show Thalang police taking shelter on the upper floor, uncertain what to do as the angry local crowd swelled to several hundred between 5pm and 10pm.

Windows were being broken and drunken people in the crowd were calling for violence. Members of the media were being threatened if they took photographs or video footage.

Two young men aged 17 and 22 died earlier in the day when their motorcycle crashed. The pair, suspected of having illegal drugs, rode off after being stopped by a police patrol.

The patrol called in assistance and one of the cars trying to cut off the two young men on the motorcycle was connected in some way to the crash that killed them both.

Video from the scene indicated they had hit a pole or a wall, somewhere on the road to the Ton Sai waterfall in eastern Phuket.

The demonstration outside Thalang Police Station grew into one of the ugliest crowd protests that Phuket has seen for some time.

When the military took charge of Thailand in May, 2014, the people who triggered three street protests on Phuket in the previous year or so were all arrested.

The word quickly spread that mass protests on the streets would no longer be tolerated.

The mystery is why there was no intervention from a senior Phuket administrator early in the evening, before traffic to and from Phuket International Airport slowed and eventually stopped.

The Phuketwan news service is closing from December 31.