ISIS has now claimed responsibility.
https://twitter.com/user/status/1430974103201226754
There is an ongoing gun fight in western Kabul and there were two more explosions in Kabul in the last 15 minutes. One in the 12th district and one in the 10th district. Earlier, a Taliban pick-up hit an IED in central Kabul. It looks like six explosions in Kabul so far.