A STATE of emergency in Bangkok could be extended until anti-government protests end completely, the Thai foreign minister has warned.

He also said he feared more violence, even though calm has returned to the capital in the last few days.

Protests aimed at overthrowing Prime Minister Yingluck Shinawatra are in their fifth month, but at the weekend the remaining activists closed down several big protest sites and moved to a central Bangkok park.

The protests are led by Suthep Thaugsuban, once a senior member of the main opposition Democrat Party, which boycotted a general election last month.

Foreign Minister Surapong Tovichakchaikul said: "If Mr Suthep continues with his protest and there are more violent incidents, including grenades thrown, shootings and acts of violence by provocateurs, the emergency law will have to stay until the situation improves."