The Organization for Security and Cooperation in Europe (OSCE) has made contact with the presumed kidnappers of its monitors in Ukraine, but the communication channel is still fragile, Swiss president Didier Burkhalter says, according to dpa. "We haven't had the possibility to build a strong relation with the hostage-takers, which would be good for finding a solution," because the contacts are infrequent, said Burkhalter, who currently chairs the OSCE. Burkhalter says he will discuss with his Russian counterpart, Vladimir Putin, in the evening in Vienna about how Moscow can help to get the eight monitors, believed to be held by pro-Russian separatists in Eastern Ukraine, released.