Investor confidence "has been hurt" by terrorist attacks carried out in emerging economies rich in natural resources, an expert has warned.
Jordan Perry, a principal political risk analyst at Maplecroft, said:
Libya, Kenya and Egypt are among a handful of countries to witness a significant increase in risk...and investor confidence in key sectors, including tourism and oil and gas, has been hurt.
When faced with rising security costs and decreasing safety for their personnel, companies can, and do, reconsider their country-level commitments.
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Political parties across the country suspended their General Election campaigns following the Manchester Arena terror attack on Monday.
Investigators believe Mr Kushner has significant information relevant to their inquiry, officials told NBC News.
The men were detained as part of an investigation by MI5 and the Metropolitan Police's Counter Terrorism Command.