The Enugu Police spokesman said the Command has not been able to identify and contact the relations or friends of the victims.
The Police Public Relations Officer in the state, Mr Ebere Amaraizu, told the News Agency of Nigeria in Enugu that the accident happened at about 9p.m. on Wednesday.
Amaraizu said that the Police is yet to identify and contact the relations or friends of the victims.
He appealed to members of the public to report to the Police any missing person or someone that undertook a journey through the Onitsha-Enugu road that has not returned home.
He said: "The accident involved an empty luxurious bus and a mass transit company mini-bus loaded with passengers coming from Enugu.
"It was gathered that both vehicles collided while plying one way, which left one person in the mini-bus dead while 11 others are in critical condition.
"Police intervention saw the conveyance of the injured persons to Ekochin Hospital 9th Mile Corner, Ngwo, near Enugu."
Amaraizu said that the remains of the deceased has been deposited at Our Saviour Hospital Mortuary, 9th Mile Corner, Ngwo, near Enugu.