[R-sig-Geo] random points

[Rodrigo W. Soria Auza]

Hi all,
I'm trying to generate a surface of 'random points' over a defined area. 
By 'randon points' I mean points that are not closer than one km each 
other. I used runifpoints (from spatstat). however, this function 
generates strictly random points, with some of them much closer than I 
expected.
could someone help me with this?. I am not really an expert with R.

Thanks in advance,

Rodrigo