YANGON, Feb. 21 (Xinhua) -- Myanmar authorities have seized heroin worth of a total street value of 157.3 million kyats (104,866 U.S. dollars) in Kachin and Shan states, according to a release of the Home Ministry Thursday.

The seizure in Momauk township, Kachin state, was made by a combined force of anti-drug squad on Wednesday when a passenger car heading from Lwejie to Momauk was intercepted on the highway at a toll gate.

The over 900-gram heroin worth of 91.3 million kyats and packed with 83 colorful soap cups was found hidden in a built-in secret case in the car.

Other seizure in Theinni township, Shan state, was also made by a combined force of anti-drug squad on Tuesday when a passenger car heading from the border town of Muse to Mandalay city in the central part was intercepted on the highway at a toll gate.

The 3.3-kg heroin worth of 66 million kyats and packed with 330 colorful soap cups was discovered hidden in the handbags of three passengers.

Along with the seizure were also 42,000 stimulant tablets worth of 84 million kyats (56,000 U.S. dollars).

The police in both areas have filed against the culprits under the country's Anti-Narcotic Drugs and Psychotropic Substances Law and investigation is underway to expose the background of the illicit drug trafficking.