KADUNA, Nigeria (Reuters) – Suspected bandits have contacted some Nigerian families to say they are holding relatives who went missing following an attack on a passenger train this week and that they will demand a ransom, the families said on Thursday. Authorities in the northern Kaduna state said eight people died and 26 were hospitalised when armed gangs blew up train tracks on the Abuja-Kaduna route and kidnapped an unknown number of passengers on Monday night. Ibrahim Abba told Reuters that unknown men called his family on Tuesday evening, informing them that they were holding his brother,…