小こ包づつみ爆ばく弾だん

noun

parcel bomb; mail bomb; letter bomb

A bomb disguised as or hidden inside a parcel, package, or letter, sent through the mail or a delivery service.

• 郵ゆう便びん局きょくで小こ包づつみ爆ばく弾だんが見みつかった。

  A parcel bomb was found at the post office.