Twitter says "unusual" activity from China and Saudi Arabia followed a users' country code bug.

President Donald Trump did not commit during a meeting with Turkish President Tayyip Erdogan at the G20 summit two weeks ago to extradite a Muslim cleric based in the United States, a senior White House official said on Monday.

Johnson & Johnson announced a stock repurchase of up to $5 billion on Monday, following Friday's Reuters report that the healthcare conglomerate knew for decades that its Baby Powder contained cancer-causing asbestos, which wiped off about $40 billion from the company's market capitalization.

Johnson & Johnson on Monday announced a share repurchase of up to $5 billion of its common stock. The repurchase plan has no time limit and may be suspended for periods or discontinued at any time, the company said in a statement.

The U.N. Security Council is considering action to push Myanmar to work with the United Nations to address the Rohingya refugee crisis, although China and Russia have so far boycotted talks on a British-drafted resolution, diplomats said on Monday.

Business software maker Oracle Corp beat Wall Street estimates for quarterly results on Monday, as it added more clients to its cloud services and license support business, sending its shares up nearly 4 percent in extended trading.

Twitter Inc shares fell almost 7 percent after the company said it was investigating unusual traffic that might be from state-sponsored hackers and, in what appeared to be an unrelated issue, a security firm said hackers used the platform to try to steal user data.

Broad stock declines in Europe and the United States dragged world equity markets lower on Monday, adding to a sell-off that has sent global stocks near 17-month lows.

Wall Street's three major indexes each slid more than 2 percent on Monday, with the benchmark S&P 500 closing at its lowest level in 14 months, on concerns about slowing economic growth ahead of a highly anticipated decision from the Federal Reserve later this week on the course of interest rate hikes.

If President Donald Trump and the U.S. Congress fail to cut a spending deal by Friday, about 25 percent of federal operations will run out of money, causing a partial government shutdown.

Oil prices fell more than 2 percent on Monday, with U.S. crude hitting the lowest since September 2017, on signs of oversupply in the United States and as investor sentiment remained under pressure from concern over global economic growth and fuel demand.

Prime Minister Theresa May said on Monday she would bring her Brexit deal back to parliament for a mid-January vote, pledging to get assurances from the European Union before then to break a deadlock over Britain's fraught efforts to quit the bloc.

Malaysia on Monday filed criminal charges against Goldman Sachs Group Inc related to its dealings with the sovereign wealth fund 1MDB, and Goldman Sachs fired back that the previous Malaysian government had lied to the investment bank.

The Justice Department on Monday asked a federal appeals court to step in and halt a lawsuit accusing President Donald Trump of violating anti-corruption provisions in the U.S. Constitution after the trial judge ruled the case could proceed.

Wall Street's major indexes each slid more than 1 percent on Monday on concerns about slowing growth and as DoubleLine Capital's Jeffrey Gundlach suggested that U.S. stocks are in a bear market.

Suspicious traffic to a Twitter Inc user forum appears to be part of a government-backed activity coming from China and Russia, a Twitter spokesman told Reuters via email on Monday.

Malaysia on Monday filed criminal charges against Goldman Sachs Group Inc related to its dealings with the sovereign wealth fund 1MDB, and Goldman Sachs fired back that the previous Malaysian government had lied to the bank.

A group of creditors has demanded payment on a $1.5 billion Venezuelan bond that is in default, their lawyer said on Monday, kicking off a long-awaited showdown between creditors and the crisis-wracked OPEC nation.

Russian interference in the 2016 U.S. presidential election on social media was more widespread than previously thought and included attempts to divide Americans by race and extreme ideology, said reports by private experts released on Monday by U.S. senators from both parties.

Brazil's Embraer SA will receive the same net proceeds from a deal to sell 80 percent of its commercial jet unit to Boeing Co, even though the U.S. aircraft maker increased the enterprise value which includes debt by 11 percent.