Police use water cannons and stun grenades to disperse a rally of teachers demanding inclusion into the monthly-pay-order scheme. -AgencyPolice have used water cannons and stun grenades to disperse a rally of teachers demanding the inclusion of non-MPO educational institutions under the monthly-pay-order scheme. Police blocked their procession, then used water cannons and sound grenades to disperse them. The teachers have been demonstrating under the Non-MPO Shikkha Pratishthan Oikya Parishad's banner since Nov 3 outside the National Press Club. We returned once before on assurances, but this time we won't leave without a formal order for MPO inclusion.