Sanjeev Gupta, the metals tycoon whose main British business was forced into compulsory liquidation last week, is facing a deepening probe by Australian regulators into his operations in the country.

Sky News has learnt that officials from the Australian Securities & Investment Commission (ASIC) last week served Mr Gupta's Liberty Steel group with a new demand for information about its activities.

Sources said the regulator had also taken possession of a mobile phone belonging to Mr Gupta as part of the probe.

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One insider said that other senior executives at the company may also have had electronic devices confiscated, although the accuracy of this claim c

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