PVE Server Reboot

Hi,
i just got an automatic server reboot at 11:03 today. Syslog is not telling a lot why this reboot occured.
Any way to find out more about this reboot ?

Marcel

Aug 14 10:59:01 pve1 systemd[1]: Finished Proxmox VE replication runner.
Aug 14 11:00:00 pve1 systemd[1]: Starting Proxmox VE replication runner...
Aug 14 11:00:01 pve1 systemd[1]: pvesr.service: Succeeded.
Aug 14 11:00:01 pve1 systemd[1]: Finished Proxmox VE replication runner.
-- Reboot --
Aug 14 11:03:51 pve1 kernel: Linux...

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