(Adds Thyssenkrupp, Sinclair Broadcast Group, Mediaset, Twenty-First Century Fox, Tidewater, Boeing, Salesforce; Updates Blackstone)
July 16 (Reuters) - The following bids, mergers, acquisitions and disposals were reported by 2000 GMT on Monday:
** Italy's biggest commercial broadcaster, Mediaset , will launch a joint takeover bid with infrastructure fund F2i for the 60 percent of its EI Towers masts unit that it doesn't already own, several sources said.
** Federal Communications Commission Chairman Ajit Pai questioned Sinclair Broadcast Group Inc's proposed $3.9 billion acquisition of Tribune Media Co, in a surprise decision that could potentially scuttle the deal and sent shares of both companies tumbling.
** Twenty-First Century Fox Inc shares dropped more than 2 percent, as investors viewed the absence of a new bid by Comcast Corp for most of Fox's assets as meaning its bidding war with Walt Disney Co for them is likely over.
** Offshore services provider Tidewater Inc said it would buy smaller rival GulfMark Offshore Inc in an all-stock deal to create a $1.25 billion company, the latest in a consolidation spurred by the recovery in oil prices.
** Top Boeing Co and Embraer SA executives defended their planned commercial aircraft partnership, saying they were confident it would win regulatory and shareholder approvals while launching Embraer into new markets.
** U.S. sales and marketing software company Salesforce said it signed an agreement to acquire Datorama, an Israeli cloud-based artificial intelligence marketing platform.
** Allied Universal, a U.S company handling security and facility services, has agreed to buy rival company U.S Security Associates (USSA) for around $1 billion. The acquisition was announced by French investment company Wendel, which has a stake in Allied Universal.
** Orange, France's biggest telecoms group, is buying Basefarm Holding in a deal worth 350 million euros ($409 million) based on enterprise value, to boost its presence in cloud computing services.
** South Africa-based mobile telecommunications company MTN Group Ltd said its Dubai subsidiary sold its Cyprus business to Monaco Telecom S.A for 260 million euros($304 million).
** Morgan Stanley Infrastructure announced a cash takeover offer for rail logistics group VTG after securing a large stake from German billionaire Klaus Michael Kuehne.
** State-run Life Insurance Corp of India's (LIC's) board approved a proposal to acquire a 51 percent stake in IDBI Bank , in a move that will provide the embattled lender much-needed capital to set aside for bad loans.
** John Laing Infrastructure Fund said it was in talks with a consortium of funds about a possible cash buyout offer that could value the company at 1.41 billion pounds ($1.9 billion).
** Wheaton Precious Metals Corp, the world's largest silver streaming company, said it would buy all of the gold assets from Sibanye Gold Limited's Stillwater and East Boulder mines in Wyoming.
** Russia's TCS Group, the parent company of Tinkoff Bank, said it had acquired a stake in Kassir.ru, one of Russia's largest ticket sales companies.
** Germany's Salzgitter said it has bid for steel and tin production facilities in Dudenlange, Luxembourg and Liege, Belgium currently being divested by ArcelorMittal .
** Linde is raising $3.3 billion from selling North and South American assets to a consortium of German gases firm Messer and buyout group CVC as it seeks clearance for a planned $87 billion merger with U.S. group Praxair.
** Several foreign funds, among them Blackstone Group and Cerberus, are considering making bids for toxic real estate assets held by Spain's Banco Santander, two sources with knowledge of the matter said. (Compiled by Arunima Banerjee and Aakash Jagadeesh Babu in Bengaluru)