* Ukraine gives separatists until 0600 GMT Monday to lay down arms

* Kiev angered by death of officer, wounding of others at roadblock

* Russia warns Kiev not to use force against militants

* Fears that confrontation could touch off wider violence

* UN Security Council to meet at Russia's request

 http://www.huffingtonpost.com/2014/04/13/ukraine-rebels-deadline_n_5143353.html