UPDATE 7-Nigeria threatens to arrest bank debtors, seize assets

* List of debtors includes powerful tycoons

* Defaulters could face arrest, asset seizures

* Bank execs sought for questioning

(Adds comment from Oando, paragraph 5)

By Nick Tattersall

LAGOS, Aug 19 (Reuters) - Nigeria's anti-graft police have given defaulting debtors of five banks rescued in a $2.6 billion bailout, including some of the nation's most powerful tycoons, a week to organise repayment or face arrest and asset seizures.

Farida Waziri, chairwoman of the Economic and Financial Crimes Commission (EFCC), set the deadline hours after the central bank published a list of the banks' debtors and warned they would face legal action if they did not pay up.

"She has given them one week to bring in their money to the commission or risk arrest, prosecution and losing their assets all over the country," EFCC spokesman Femi Babafemi said.

The central bank's list of more than 200 firms, individuals and state bodies contains stockbrokers and local oil and gas firms as well as larger companies, including conglomerates Transcorp (TCNP.LG: Quote, Profile, Research) and Dangote Industries and fuel distributors African Petroleum (APET.LG: Quote, Profile, Research) and Oando Plc (UNIP.LG: Quote, Profile, Research).