By Pavel Polityuk and Natalia Zinets KIEV (Reuters) - One Ukrainian soldier was killed and another wounded fighting pro-Russian separatists in the east, a military spokesman said on Thursday, as Kiev accused rebels of increasing violations of a ceasefire deal. President Petro Poroshenko, whose initiative to boost the armed forces by a third 250,000 personnel was passed easily in parliament, has called the ceasefire the last chance for peace with the pro-Russian rebels. Some 6,000 people have been killed in fighting since separatists took up arms last year in Ukraine's eastern industrial heartland in response to the overthrow of the Moscow-backed president Viktor Yanukovich in Kiev. Another military spokesman said rebels had attacked Ukrainian troop positions or civilian targets 40 times in the previous 24 hours, including 17 artillery attacks.