Red-shirt leaders are exercising extreme caution after hard-core leader Kwanchai Praipana was shot and wounded in an attack outside his home in Udon Thani.
Nisit Sintuprai, director of the United Front for Democracy against Dictatorship (UDD) school and red-shirt leader, said the gun attack on Mr Kwanchai on Wednesday indicated that the political struggle between the pro-democracy group and anti-democratic elements was fierce.
It is not yet known who carried out the attack on the red-shirt leader.