New Delhi, June 29 (ANI): The 24-hour countdown for PSLV-C23 Mission has begun at Satish Dhawan Space Centre at Sriharikota on Sunday. The mission began at 8:52 am on Saturday with a delay of 3 minutes from the proposed time due to the high chances of space debris getting in the way of the launch vehicle. Prime Minister Narendra Modi will witness the launch of PSLV-C23 rocket on June 30, as it will carry five foreign satellites into the space. Meanwhile, security in Sriharikota and Chennai is heightened ahead of PM's visit.