(Reuters) - Mystery surrounded the whereabouts of Syrian President Bashar al-Assad on Thursday, a day after a bomber killed and wounded his security chiefs and rebels closed in on the centre of Damascus, vowing to "liberate" the capital.
The Syrian leader made no public appearance and no statement after a bomber killed his brother-in-law, his defense minister and a top general.
By the early hours of Thursday, residents had reported no let-up in the heaviest fighting to hit the capital in a 16-month revolt against Assad's rule.
The fighting came within sight of the presidential palace, near the security headquarters where the bomber struck a crisis meeting of defense and security chiefs.
Assad's brother-in-law Assef Shawkat, a top commander and one of the pillars of the Assad clan's rule, was killed in the blast along with Defense Minister Daoud Rajha.
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