On 26 January, a fourth case of the virus was detected, which was unconnected to the previous cases.[82] A suspected case was also detected in the state of Kedah's island of Langkawi involving two Chinese nationals female with both victims quarantined at the Sultanah Maliha Hospital.[83][84] With the increasing confirmation cases reported in neighbouring Thailand, both the state of Kedah and Penang tightened their borders by conducting stringent checks at its international entry points.[85]