AstraZeneca’s $39 billion acquisition of Alexion is being investigated by the UK’s Competition and Markets Authority (CMA) to determine if the deal is anti-competitive.

The Federal Trade Commission staff reviewing Roche’s plan to buy U.S.-based gene therapy specialist Spark Therapeutics for $4.3 billion recommended that the deal be approved without requiring any asset sales, the Capitol Forum reported.

Swiss drugmaker Roche’s $4.3 billion takeover of U.S. gene therapy specialist Spark Therapeutics was pushed back again, possibly beyond first-half 2019, as regulators continue to scrutinize the deal’s effect on competition.