Ukrainian unity was on display Thursday night as peaceful demonstrations were held in at least four eastern cities condemning Russia for its perceived meddling in Ukrainian affairs. At the Donetsk rally, which drew a few thousand people, the crowd listened to speeches condemning Russia and resisting the pro-Russian movement that is pushing for autonomy for eastern Ukraine, AP reported. Similar rallies were held in Luhansk, Mariupol and Kramatorsk. Key government buildings have been occupied by pro-Russian groups in all four cities. Political developments in eastern Ukraine have for weeks been dominated by a small, vocal and recently armed opposition to the interim government in Kiev. Parliamentary deputy Oleh Lyashko, who is running for office in the May 25 presidential election, rejected charges that Russian-speakers in the east had been subject to any discrimination. He also said the armed groups active in the seizures of buildings would not prevail. "Let those who have weapons be afraid of us, we will fight back. Let the ones who want to split up our country be afraid, because we won't allow them to do it," Lyashko said. Hromadske television reported that police in Kramatorsk managed to thwart an attempt by pro-Russian activist to attack a pro-unity rally of about 500 people. Overnight Wednesday, three people were killed and 12 injured after a mob of 300 pro-Russian protesters armed with stun grenades and firebombs tried to seize a National Guard base in the Black Sea port city of Mariupol. Ukraine's Interior Ministry said shots fired by servicemen in the base initially proved insufficient to deter the mob. There were no casualties among Ukrainian servicemen, the ministry said. At least 63 people involved in the attack were detained, but local media cited police as saying 38 were later released. -- SPA 22:54 LOCAL TIME 19:54 GMT تغريد