An ambassador from New Zealand said Sunday that he was "very concerned" about the safety of two kidnapped Fox News journalists, and urged their unknown kidnappers to "please release these men." The ambassador, Peter Ridder, spoke outside the office of Palestinian Prime Minister Ismail Haniyeh in Gaza City shortly after the two men met. Ridder arrived in the area several days ago to lead a delegation working to free cameraman Olaf Wiig, 36, of New Zealand, who was seized Monday along with American correspondent Steve Centanni, 60, from their TV van near the Palestinian security services headquarters in Gaza City. Earlier Sunday, Centanni's brother Ken appealed for his brother's safety. "Please contact our family," Ken Centanni urged the kidnappers. "Let us know he is alive and unharmed." Centanni's comments, first shown on Fox television, were later aired on the Arab satellite TV station, Al-Jazeera.