The billionaire Beny Steinmetz was detained by the Israeli police on Monday morning for questioning in connection with an investigation into money laundering, obstruction of justice and bribery, officials said.

Mr. Steinmetz, an Israeli diamonds, mining and real estate magnate, is already under scrutiny by law enforcement authorities in four other countries, including the United States. Federal prosecutors in the United States are investigating whether representatives of his firm bribed government officials in Guinea to secure a multibillion-dollar mining deal. In Switzerland and Guinea, prosecutors have conducted similar inquiries. He was previously detained and questioned in Israel in December.

Since 2013, the United States Justice Department has been investigating Mr. Steinmetz’s company, BSG Resources, over potential violations of the Foreign Corrupt Practices Act. The Guinean government has claimed that BSG Resources obtained an iron ore mining concession by paying more than $8 million in cash through a representative to the then-wife of the country’s president.

The focus of the Israeli investigation appears to be more expansive, based on an official statement that said that authorities were investigating “a number of people on suspicion that they acted systematically together with the main suspect in order to create and present fictitious contracts and deals, among other things in the field of real estate in a foreign country, for the purpose of transferring funds and money laundering.”