Smoke rises from what is said to be the Syrian town of Qusair after ferocious battles between rebels and Hezbollah fighters backing President Bashar al-Assad.<br/> <br />In another video obtained from a social media website, unidentified rebel groups fire anti-aircraft guns, apparently on the town's outskirts.<br/> <br />Reuters cannot independently verify the content of these videos.<br/> <br />Syrian activists say rebels pushed back the attacking government forces, killing about 30 Hezbollah fighters and 20 Syrian troops.<br/> <br />But state media reported a different version of events, saying the army had restored security to most of Qusair and cornered what they called "terrorists".<br/> <br />Syrian government restrictions on independent media access make it hard to verify either account.<br/> <br />Meanwhile, tensions are high in Lebanon's northern city of Tripoli, where the Lebanese army has deployed after the Syrian conflict once again spilled over into the city.<br/> <br />At least one person was killed in fig
