The remote New Britain Island located in Papua New Guinea was recently struck by a powerful quake.
McKee said attempts were being made to contact local agencies in New Britain to check whether the quake caused any damage.
The warning Center for tsunamis in the Pacific has warned that a tsunami could hit the coasts of this country, and the Solomon islands.
The Pacific Tsunami Warning Center initially warned hazardous tsunami waves were possible in coastal areas 300km from the epicentre.
Also on Thursday, a magnitude-6.0 natural disaster struck just off the popular island of Bali, Indonesia, where the International Monetary Fund and its sister lending organisation, the World Bank, were holding annual meetings until Sunday.
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"A tsunami threat exists for parts of the Pacific located closer to the quake", the Pacific Tsunami Warning Center said in a bulletin.
Papua New Guinea sits on the Pacific Ring of Fire, a region that is widely regarded as geologically active.
The strong quake was felt in Denpasar on the holiday island of Bali, where panicked people fled from buildings. The quake killed at least 100 people. After the 7.0 magnitude quake, it was quickly followed by a magnitude 5.7 and magnitude 5.9 aftershocks.
There were a string of smaller tremors measuring up to 6.2 immediately before and after the main natural disaster.
The country is still recovering after a 7.5-magnitude quake hit its mountainous interior in February, killing at least 125 people, cutting off access to villages and knocking out power. The quake's epicenter was located around 200 kilometers southwest of Rabaul at a depth of 40 kilometers.