Members of two CPI(M)-backed teachers' organisations clashed with the police in the northern West Bengal city of Siliguri on Monday. Hundreds of members of the All Bengal Teachers' Association (ABTA) and All Bengal Primary Teachers' Association (ABPTA) were marching to 'Uttar Kanya', the north Bengal secretariat of the state government, from Jalpai More to press for their demands when they were stopped at the Tinbatti More area.