NEW DELHI - Indian police were searching New Delhi Monday for the men who gang-raped a 23-old-student and threw her off a bus in an attack that has sparked fresh concern for the safety of women in the city. The woman accompanied by a male friend boarded a bus on Sunday night and was attacked by at least four men and gang-raped, police said. Some media reports said the attackers also included staff of the bus. The victim’s companion was battered with iron rods before the men took turns and raped her, police officials said. The couple were then thrown off the moving bus, seriously injuring the woman, they said. “When they boarded the bus, there were a few other men as well in the vehicle,” area police chief Chhaya Sharma told reporters.