ABUJA (Reuters) - The Economic Community of West African States (ECOWAS) will hold an extraordinary summit on Guinea on Thursday, according to a staff memo shared with Reuters.

       Special forces soldiers ousted long-serving President Alpha Conde and dissolved his cabinet on Sunday, prompting ECOWAS to demand a return to constitutional order and threaten to impose sanctions.

       An ECOWAS spokeswoman did not immediately reply to a request for comment late on Monday.

       (Reporting By Camillus Eboh in Abuja, writing by Libby George; Editing by David Gregorio)