SASARAM, Dec. 19 -- In a tragic incident, four youths were killed on the spot in a head-on collision between two speeding bikes near Gohi turning in Ayarkotha police station area of Rohtas district, late on Wednesday evening. Police said Vikas Tiwari of Prayag Bigha Pani Tanki locality at Dalmianagar was going to attend a birthday party with his friend Bunty Sharma at Dhanaon village in Nasriganj police station area. About 8pm, when they reached near the Gohi turning, they had a severe collision with a bike coming at high speed from the front. The four youths were thrown on the road and the bikes caught fire. After being informed by locals Ayarkotha police reached the place and took the victims to nearby Akorhigola community health centre where doctors declared them dead. The other two deceased were identified as Anmol Sharma of Mangitpur, and Alok Kumar of Hamradih village, SHO Shivam Kumar said....