A sick stalker sent a suspicious package to a Swedish princess yesterday, causing police to dispatch the Bomb Squad to the Midtown office building where it was delivered, sources said.

Wires, cassette tapes and a bra and panties were inside, but no explosives, the sources said.

It did contain a love letter addressed to the princess.

While the letter contained no specific threats, the matter was turned over to NYPD intelligence, the sources said.

The sources would not say if the intended recipient was Crown Princess Victoria, who is first in line to the Swedish throne, or her younger sister, Princess Madeleine.

Madeleine is touring the United States this month on behalf of a charity that has offices in the building at 183 Madison Ave., where the package was sent. Both princesses have recently become engaged. Members of the royal family stay at the building when they’re in New York, but sources said the princess involved was not there at the time.