New Delhi, Nov 03 (ANI): Security Expert Uday Bhaskar on Monday termed the suicide attack at Pakistan side of Wagah border as a serious internal security challenge for India. He said the fact that assailants can reach at such sensitive area says that proper vigil and increase in arrangements for security is required on both sides. He also pointed out at the possibility of India too being on the radar of such attacks. Bhaskar said that India would have to acquire the capacity for surveillance on both side of the border after the incident. At least 55 people lost their lives and several were left injured when an explosion took place on Pakistan side of Wagah border just after a daily ceremony when troops from both sides simultaneously lower the two nations' flags.