JAMMU: Defence Minister Rajnath Singh left Delhi to visit Rajouri and Jammu today to review security after the Poonch attack on army vehicles, in which four jawans were martyred. Four Army personnel were martyred while three others were injured after heavily armed terrorists ambushed two Army vehicles near Thanandi in the Rajouri sector on Thursday last week. Security has been beefed up in Jammu ahead of Defence Minister Rajnath Singh’s visit. Amid the recent increase in attacks on its troops, the Indian Army is planning to increase the number of troops in the Poonch-Rajouri sector to curb the activities of the Pakistani terrorists there, sources said on Monday