I'm a graduate student applying for summer internships, and some companies have several internships that interest me. If I apply to multiple internships, I don't know if any of the applications will be seen by the same people, or if the reviewers for one position might pass my application to the reviewers for another position that they think is a better fit. There is no HR contact information available other than the online search and application pages, which require separate applications for each position.
Is there any standard or best practice for applying for multiple positions at the same company? Should I mention in my cover letters that I'm interested in or applying for multiple positions?