A car bomb rocked one of Syria’s largest cities, Aleppo, on Sunday as protesters gathered across the country to commemorate the one-year anniversary of the start of the uprising. At least three people were killed and 25 others wounded. The state-run Syria TV blamed the attack on “terrorists” and said the blast hit two buildings behind a post office, while the British-based Syrian Observatory for Human Rights said the bomb went off behind a security office. The regime of President Bashar al-Assad enjoys strong support in the city, as it does in the capital, Damascus, so it was rare that a march broke out there one year after protests began across the country. The opposition reported that security forces arrested and beat activists to crush the small demonstration of about 200 people.