At least four people have been killed and more than a dozen injured after a suicide bomber blew himself up in central Damascus on Tuesday afternoon, according to Syrian state television.<br /><br /> The TV station described the bomber as “wearing an explosive belt” which he exploded in the Jebbeh district of the Jisr al-Abyad neighbourhood “causing deaths and injuries.” <br /><br /> Britain-based watchdog the Syrian Observatory for Human Rights says the target appeared to be a government building in the capital.