INLD activists in Haryana on Wednesday paid rich tributes to former deputy prime minister Devi Lal on his 15th death anniversary, a party spokesperson said.Workers of the Indian National Lok Dal, the main opposition party in the state, held prayer meetings to salute the former chief minister.In Gurgaon district, several party members gathered at the Tau Devi Lal park in Sector 23, Manesar and Sohna and held prayer meetings.Devi Lal twice served as chief minister of Haryana -- first in 1977-79 and in 1987-89. He was the deputy prime minister of India in 1989-90 when V.P. Singh was the prime minister.Born on September 25, 1914 in Sirsa in Haryana, Devi Lal died on April 6, 2001 in New Delhi.