If Pakistani peacekeepers were involved, they should be disciplined and punished according to the law.
These accusations are not new. Here is one against Indian troops.
http://www.dawn.com/2008/03/18/rss.htm#6
Back in 2004, there were 68 alleged cases against peacekeepers from Uruguay, Morocco, Tunisia, South Africa, Pakistan and Nepal.
http://www.washingtonpost.com/wp-dyn/articles/A3145-2004Dec15.html
either these cases are false accusations, or they are simply buried due to the fear by UN that countries will stop sending their troops to war ravaged countries.