All the 11 passengers and two pilots survived.
The civilian aircraft, whose tail number is RPC-1111, dived at Cagayan river, specifically at the village of San Vicente in Iguig town, Cagayan province at around 1:30 p.m., said Senior Superintendent Mau Aplasca, Cagayan police chief.
It was flying from Basco town, Batanes province to Tuguegarao city, Cagayan province.
"According to the pilots, it was a planned emergency landing after the two engines developed trouble and shut down in mid-air. The plane is still at the shallow part of Cagayan river at the crash site," said Aplasca.
The 11 passengers who were rescued and the two pilots were taken to Iguig town, in Cagayan, Northern Philippines.