(Refiles to add UPDATE 1 in headline)
KIEV, March 17 (Reuters) - Ukraine's parliament endorsed on Monday a plan to mobilise 40,000 reservists to counter Russia's "blatant aggression" in Crimea and guard against what a senior official described as further incursions in the south and east of the country.
Andriy Parubiy, Secretary of the National Security and Defence Council, told parliament that 20,000 reservists would be deployed as part of the armed forces and the other half would serve in a newly-created National Guard.
Crimea was brought under Russian control earlier this month and in a referendum held on Sunday, more than 96 percent of voters were officially said to have backed a proposal to secede from Ukraine and become part of Russia.
"What has taken place is a seizure, blatant aggression, the seizure by Russia of parts of the territory of Crimea and the city of Sevastopol," Parubiy told the chamber before the vote.
"We now have grounds to state that the measures being taken today are enough to prevent a repeat of the Crimean scenario in Ukraine's southeastern regions."
These regions include Donetsk and Kharkiv, two cities which have seen unrest and clashes between pro-Russian and rival demonstrators, as well as Odessa, a Black sea coastal area to the northwest of Crimea.
A total of 275 members in the 450-seat assembly backed the measure. About 30 deputies in the chamber refused to vote.
A decree by acting President Oleksander Turchinov called for mobilisation within 45 days and provided for complete financing and provision of facilities for the reservists.
Russian President Vladimir Putin has said he reserves the right to defend the rights of Russian-speaking Ukrainians in southern and eastern Ukraine following the installation of a pro-Western government in Kiev last month. However, his foreign minister has said Moscow has no plans to invade these areas.
Violent pro-Russian demonstrations have taken place in eastern Ukrainian cities, disturbances blamed by authorities in Kiev on "Kremlin agents". (Reporting by Natalya Zinets, Writing by Ron Popeski; Editing by Richard Balmforth and David Stamp)