Nigeria, July 2 -- The incident occurred on Saturday evening. Witnesses said the doctor collapsed minutes after stepping out of his vehicle and was rushed to the hospital's emergency unit by colleagues.

According to Suleiman Harbo, an aide to the Jigawa State Governor, Dr Ibrahim had agreed to stand in for another consultant who was unavailable.

Harbo, who had accompanied his elderly mother to the hospital at about 5 p.m., said about six patients, most of them over 80 years old, had been waiting to see the doctor.

Harbo said hospital staff contacted Dr Ibrahim, who told them he would come after observing the Maghrib prayer.

He arrived shortly afterwards but reportedly became dizzy immediately after stepping out of his vehicle. Fellow...