Lim Yong Nam is indicted for allegedly sending thousands of radio parts to Iran in violation of a trade ban.

The parts were allegedly sent from there to Shia militias in Iraq.

Mr Lim, also known as Steven Lim, had been detained in Indonesia for the last 18 months. He was indicted in 2010 for smuggling and making false statements.

He has pleaded not guilty to the charges in a Washington court.

Mr Lim told US officials he was unaware of restrictions on US exports to Iran.

The US says that 16 of his radio parts were found inside improvised explosive devices (IED) in Iraq.

IEDs have accounted for most of the casualties among US soldiers serving there.

Mr Lim, 42, and several other defendants are accused of buying thousands of radio frequency modules from an unnamed Minnesota company and then lying to the US government by saying that Singapore was the intended destination of the goods.

The indictment describes IEDs as the biggest threat to US troops in Iraq and says they were responsible for about 60% of American combat casualties in that country between 2001 and 2007.

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