New Delhi: Delhi is on high alert on the occasion of Holi as Central agencies have issued a warning about a former Pakistan army soldier entering India through Punjab with six terrorists last month, and a possible attempt by them to carry out terror attacks here during Holi. The main target of these terrorists would be hotels and hospitals. 
 
Security was stepped up in the national capital Thursday to prevent any mishap. 
 
Security has been significantly heightened at the airport, railway stations, bus stands and other vital installations in the city