Local residents are roped into searching for four other suspects who fled.
Hundreds have been caught along the way and confined to refugee detention centers in Thailand.
Sources say the young attacker has been detained, but his motive was unclear.
One police official says the attackers were angry about restrictions placed on the wearing of veils and beards.
Orders from 'higher up' say all holders of individual passports must deposit them with the authorities pending background checks.
Authorities refuse to let Ilham Tohti receive gifts of money and clothing in prison.
The decree goes against public scorn for the products as taboo in Islam.
Authorities, who suspected them of being terrorists, confirmed the incident this week.