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Al Jazeera’s correspondent in Kabul reports explosions and anti-aircraft fire as Pakistan bombs the capital city.

Pakistan has bombed Afghanistan’s capital, Kabul, and other cities as fighting spread following attacks by Afghan forces against Pakistani military positions along their shared border earlier.

Al Jazeera’s correspondent in Kabul, Nasser Shadid, reported early on Friday that a bombing raid targeted the Afghan capital at 1:50 am local time (21:20 GMT), followed by a second air raid.

Afghan anti-aircraft guns opened fire after the first raid and continued firing after the second, according to Shadid.

An Afghan government source confirmed to Al Jazeera that an air strike had hit Kabul, and Pakistani warplanes also hit a military base in Kandahar province in southern Afghanistan.

This is a breaking news story. More to follow shortly.