Nexus 6p keeps rebooting

Im having issues with my nexus 6p. It randomly restarts itself. This morning I was watching a movie and the phone randomly restarted itself. It kept restarting for 45 minutes. Later it worked fine and around noon same story started rebooting and haven't worked since. I tried boot in safe mode ,factory reset etc by pressing power button and up volume but nothing worked. The phone doesn't boot past the google logo. Any ideas what else I can do? Thanks.

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