A top EU official says the 28-member bloc will provide armored cars and satellite imagery to monitor a cease-fire in Ukraine but is undecided whether to commit troops to a proposed U.N.-mandated peacekeeping mission.

Maciej Popowski, deputy secretary general for External Action Service, said Thursday "there needs to be more clarity" on the proposal by Ukrainian President Petro Poroshenko before the EU could decide on sending troops to Ukraine.

He spoke to reporters after a meeting of the EU's defense ministers in Riga.

France's Defense Minister Jean-Yves Le Drian said separately the OSCE would be sending some 400 ceasefire observers to Ukraine. The EU and NATO have urged the pro-Russia separatists to allow OSCE observes to monitor the shaky cease-fire deal.