Twitter spam

[minestrone]

I get the odd "what are you doing in this photo" direct mails. I think they are fairly common.

A few friends that I follow who should know better seem to have been hacked this way.

[Pondlife]

I have had a number of notifications of direct tweets supposedly from people I know.

I get the email notification and also an indicator on my twitter app icon but when I look they're gone.

The tweets clearly aren't being personally sent by the person claimed.

Is this some auto spam type thing or has their/my account been compromised.

TIA