(CNN) - Relatives of three American hikers detained in Iran are still waiting for news about their loved ones.
[cnn-photo-caption image= http://i2.cdn.turner.com/cnn/2009/US/09/01/iran.us.hikers/art.shourd.afp.gi.jpg caption="Sarah Shourd, seen in a family photo, is one of three American hikers detained in Iran."]
More than a month has passed since Iranian authorities detained Shane Bauer, Sarah Shourd and Josh Fattal after they strayed into Iran - by accident, a friend and relatives say - while hiking in northern Iraq.
Their relatives in the United States have heard nothing about their fate, they said Tuesday on CNN's "American Morning."
"We know they're being detained in Iran. Beyond that, we haven't heard anything from them," said Nora Shourd, the mother of Sarah Shourd.
The waiting takes a toll.
"It's just very difficult," said Alex Fattal, Josh Fattal's brother. "Each day feels like a month.
"It's a long time - each hour, each day - to not know under what conditions Josh, Shane and Sarah are being held and if they're OK."
The hikers' relatives said they hope the Iranian government lets Swiss diplomats visit the hikers. The Swiss government represents U.S. interests in Iran. The U.S. and Iran have not had diplomatic relations since the American hostage crisis of 1979.