Mute OpenVPN Client logs

Does anyone know how to disable openvpn client logs from writing entries to /var/log/messages such as:

Dec 28 09:48:43 tomato daemon.notice openvpn[10270]: VERIFY OK: nsCertType=SERVER
Dec 28 09:48:43 tomato daemon.notice openvpn[10270]: VERIFY OK: depth=0, C=UK, ST=NR, L=xx, O=xx Pro, OU=VPN, CN=server, emailAddress=xx
Dec 28 09:48:44 xx daemon.notice openvpn[10270]: Data Channel Encrypt:
Dec 28 10:02:44 xx daemon.notice openvpn[10270]: OpenVPN STATISTICS
Dec 28 10:02:44 xx daemon.notice...

Mute OpenVPN Client logs