7:30 AM -- Huawei Technologies Co. Ltd. 's latest effort to bid for a Long Term Evolution (LTE) network deal in the U.S. has been blocked by the U.S. government over national security concerns, The Daily Beast reported on Tuesday. And now, Huawei wants to know why.

A U.S. Commerce Department spokesman said Huawei will not participate in building the national wireless network for emergency services "due to U.S. government national-security concerns," according to the report.

Huawei is asking the U.S. government to explain what those concerns are and how it reached this decision. The vendor intimated that such decisions could threaten Huawei's future investment in the country, according to a Bloomberg report.

The project that Huawei has been barred from is the 700MHz LTE public safety demonstration network for emergency first-responders such as police and firefighters.

The news emerged just as Huawei launched a new Android tablet for the U.S. market and revealed its ambition to be one of the top five device suppliers in the country within the next three years. (See Huawei's Springboard Into the US?)

Here's a look back at the Huawei's U.S. efforts:

— Michelle Donegan, European Editor, Light Reading Mobile