The demonstrators will resume negotiations if the government lifts a state of emergency and other measures and shows responsibility for the deaths of protesters on two days this month, said Weng Tojirakarn, a co-leader of the anti-government Red Shirt protesters.

His remarks come as tension remains high on the streets of Bangkok, where a political standoff has gripped the country for several weeks.

The Red Shirts have been clashing with the Thai military in a Bangkok area that serves as a financial hub.

Another co-leader of the Red Shirts, Veera Muskapong, met with foreign diplomats on April 23 and told them he might meet with the government if it meets certain conditions.

Prime Minister Abhisit Vejjajiva, meanwhile, huddled with the chiefs of the country's armed forces early April 23 after a string of grenade attacks killed at least one person and wounded dozens of others.

Deputy Prime Minister Suthep Thaugsuban said in a televised address that the grenades were launched from the area where the Red Shirts have been encamped for weeks, but the protesters denied any responsibility for the attacks.

Suthep told Thai television earlier that three people died in the attacks, but Bangkok's Erawan Emergency and Rescue Center later revised the number to one. At least 87 people were wounded, the center said.