Until recently, I thought that reports of this subtle type of bias were perhaps biased in and of themselves. But when it's so easy to find...take these two recent NY Times headlines:

Israeli Troops Kill Palestinian in West Bank Clash

Suicide Attacker Kills 4 in Blast at Tel Aviv Bus Stop

Notice how in the first article the perpetrators (Israelis) and the victim (Palestinian) are clearly pointed out in the headline. The second headline could be Slavs killing Vietnamese - you wouldn't know from the headline that a Palestinian terrorist killed any Israelis.