from Turkey. Similar reports have been published by Haaretz. In 1998, Israeli businessman Nahum Manbar was sentenced to 16 years in prison in Israel for doing business with Tehran, and in the course of the investigation, "hundreds of companies" were found to have illegal business dealings with Iran. The fall-out reached the United States as some transactions were alleged to have been part of the Iran–Contra affair. A controversy over Israeli-Iranian business links erupted in mid-2011. Israeli company Ofer Brothers Group was subject to U.S. sanctions after it was revealed that it sold ships to Iran via a third party, and that its ships also docked at Iranian ports. However US government cleared Ofer Brothers Group from the list three months later. In 2006 Israeli newspaper Haaretz reported the Israeli refinery Paz reportedly purchases crude oil coming from Iran. The article reported that the oil from Iran arrives to Israel through a port in Rotterdam. Another article in Haaretz in the same year reported that the Israeli energy minister Benjamin Ben Eliezer said: "Every attempted contact with an enemy state that serves Israeli business and economic interests, strengthens the stability of the region." And the Israeli foreign ministry said that it was not their business to look into the sources of oil. Ynet reported that Israeli–Iranian trade, conducted covertly and illegally by dozens of Israeli companies, totals tens of millions of dollars a year. Much of this trade is conducted through a third country. Israel supplies Iran with fertilizer, irrigation pipes, hormones for milk production, seeds, and fruit; Iran, meanwhile, provides Israel with marble, cashews, and pistachios. Based on the same report in November 2000, the Iranian government asked an Israeli company, which built Tehran's sewage pipes 30 years earlier, to visit the country for renovations. Shortly afterwards, the assistant director-general of Iran's Ministry of Agriculture visited Israel secretly and stayed at the Tel Aviv Hilton Hotel. He expressed an interest in purchasing irrigation pipes, pesticides and fertilizers. In April 2009 a large batch of oranges carrying stickers of an Israeli company were distributed in the Iranian market. Based on the investigations the oranges were imported from Dubai. In December 2011 Bloomberg reported that most of the filtering equipment currently in use in Iran were bought from an Israeli company called Allot Communications. The system called NetEnforcer allows the government to monitor any device that is connected to the internet.