Police are investigating a home invasion on the northwest side overnight, 1200 WOAI news reports.


  Around midnight Friday morning, police say four men wearing masks forced their way into an apartment at the Aspen Heights Apartments.  That's located just off Hausman Road near UTSA.


  Two of the men had guns.  A man in the apartment was robbed of money.


  Police don't have much to go on, they don't have a description of the crooks' vehicle or which way they fled.