The WhatsApp instant message program announced Monday evening that suspicious messages will now be marked with a special warning.

A company statement said the check will appear when the link contains a line of characters that is considered unusual, and which could cause the surfer to think that he is going to reach a legitimate site, but will actually arrive at a suspicious site. Users can click on the warning and see the suspicious signs in the message - and then choose whether to continue surfing or click on the link anyway. The company stressed that this would not harm the privacy of users.