The Latest: Blast aboard bus in northern Syria kills 3

DAMASCUS, Syria (AP) " The Latest on the Syrian conflict (all times local):

1:45 p.m.

A Syrian war monitoring group says a blast aboard a bus in the northern Syrian town of Afrin has killed at least three people.

The attack came on the anniversary of a Turkish military operation that evicted Kurdish fighters from the town.

The town now is under the control of Turkey-backed Syrian opposition fighters.

The Britain-based Syrian Observatory for Human Rights says three people were killed and nine wounded in the explosion.

The Syrian Civil Defense, an opposition-linked group known as the White Helmets, says the blast left "martyrs" and that others were wounded and rushed to hospitals.

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1:40 p.m.

Syrian state media is reporting that air defenses have repelled an Israeli airstrike south of the capital, Damascus.

State TV says the air defenses "prevented" the attack from achieving its goals.

Damascus residents say they heard five explosions on Sunday, apparently the sound of air defenses firing into the air.

Israeli warplanes have used Lebanon's airspace recently to strike deep inside Syria, including on a warehouse near Damascus International Airport, according to Syrian state media. Israel rarely comments on such reports.

Earlier this month, Israeli Prime Minister Benjamin Netanyahu confirmed that Israel has struck hundreds of Iranian and Hezbollah targets in Syria, including a weapons facility two weeks ago.

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8:45 a.m.

Syrian state TV is reporting an explosion in a southern neighborhood of the capital, Damascus.

It says the Sunday morning blast, which happened during rush hour on the first working day of the week, appears to have been "a terrorist act."

There was no immediate word on casualties in the southern neighborhood of Qazaz, near a main highway leading into central Damascus.

State media say all roads leading to the scene of the blast have been closed.

Explosions have been rare in Damascus since Syrian government forces captured the last rebel-held neighborhoods and suburbs of the capital last year.

Such blasts had left hundreds dead over the course of the nearly eight-year civil war.