A method of receiving a warning message in a mobile communication system. The method includes receiving a paging message from a network, wherein the paging message includes information related to the warning message. The information is a warning message indication representing a presence of the warning message. The warning message is an Earthquake and Tsunami Warning System (ETWS) message. If the warning message indication is included in the received paging message, the method includes receiving the warning message through a downlink channel according to scheduling information contained in a system information block (SIB).