Narrative:

I sent aircraft Y around after I observed and coordinator also alerted me to air carrier X crossing the runway at taxiway north while aircraft Y was short final.

Google
 

Original NASA ASRS Text

Title: PHL CTLR DESCRIBED GAR EVENT WHEN TAXIING ACFT CROSSED RWY WITH TFC ON SHORT FINAL.

Narrative: I SENT ACFT Y AROUND AFTER I OBSERVED AND COORDINATOR ALSO ALERTED ME TO ACR X XING THE RWY AT TXWY N WHILE ACFT Y WAS SHORT FINAL.

Data retrieved from NASA's ASRS site as of May 2009 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.