Petro Poroshenko's inaugural address after taking the oath of office in parliament gave little sign of a quick resolution to the conflict in the east, which Ukrainian officials say has left more than 200 people dead.

He also firmly insisted that Crimea, the Black Sea peninsula annexed by Russia in March, "was, is and will be Ukrainian." He gave no indication of how Ukraine could regain control of Crimea, which Russian President Vladimir Putin has said was allotted to Ukraine unjustly under Soviet leader Nikita Khrushchev.

Hours after the speech, Putin ordered security tightened along Russia's border with Ukraine to prevent illegal crossings, Russian news agencies said. Ukraine claims that many of the insurgents in the east have come from Russia; Poroshenko on Saturday said he would offer a corridor for safe passage of "Russian militants" out of the country.

Rebel leaders in the east dismissed Poroshenko's speech.

(kh/ap)