The foreigners were going to visit Ajaypal dham when the youths allegedly attacked them. They also molested and tore the clothes of a woman in the group, Additional Superintendent of police Avinash Kumar said.
Two women in the group are from Spain and Turkey and one man is from the USA while the nationality of the other foreigner is not yet known, police said.
A case under relevant sections of IPC including molestation has been registered and investigation is on, Kumar said, adding no one has been arrested yet.