A ceremonial parade, organized on this occasion in Aizawl, was attended by state DGP Thianghlima Pachuau and other officers of the state police.
They also laid wreaths on a memorial stone, set up as a mark of respect to the martyred personnel, at the headquarters of the first battalion of the Mizoram Armed Police here.
Police Commemoration Day is observed every year to honour the sacrifices of 10 officers who were killed by Chinese forces at Hot Springs, Ladakh, in 1959.
Ten were killed in the incident, seven were taken prisoners and the remaining managed to escape.
During the annual conference of Inspectors General of Police of states and union territories in January 1960, it was decided that October 21 would be observed as Police Commemoration Day throughout the country as a mark of respect to all personnel who laid down their lives in the line of duty.
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