Thailand's military government has set up security centers around the country ahead of an August referendum on a new constitution, a spokesman for the government said on Monday.

The centers are the latest measure rolled out by the government as Thailand prepares to vote on a new constitution that critics fear will entrench the military's influence.

The draft of Thailand's 20th constitution is to replace one scrapped after a 2014 coup by generals who promised stability in Southeast Asia's second-biggest economy.