KIEV, June 1 - A special mission of the Organization for Security and Cooperation in Europe is in talks with a number of groups in eastern Ukraine to release two of its teams that have been detained there for days, Reuters reported Sunday.

A team of four monitors has been held in the Donetsk region since last Monday evening, while another four plus a Ukrainian translator were detained around the Luhansk region on Thursday. There has been sporadic fighting in both regions between pro-Russian separatists and Ukrainian forces.