Thai police have staged a protest in Bangkok to show their frustration after weeks of dealing with aggressive and often violent anti-government demonstrators.

About 500 police with family and friends gathered Monday in a public square near the main protest camp, four days after a policeman was shot dead in a pitched battle with demonstrators who were trying to stop candidates from registering for February elections.

Police came to mourn the officer but also to complain that they were not properly equipped or organized to defend themselves. They're also protesting restraint on their use of force they say allowed demonstrators to humiliate them.

The demonstrators are demanding the government of Prime Minister Yingluck Shinawatra make way for an appointed council to institute political reforms to eradicate corruption before any polls.