Equities markets in London saw declines on Tuesday.

The FTSE 100 dropped 1.14 percent to 6,636.4, while the FTSE 250 was 1.08 percent lower to 11,732.1.

Miners were lower after rumors circulated that BHP Billiton (LSE: BLT; ASX: BHP; NYSE: BHP) might be interested in bidding for US aluminium producer Alcoa (NYSE: AA).

BHP Billiton was the worst performer on the 100 on the day, dropping 3.89 percent to £14.83.

Elsewhere in the sector, Xstrata (LSE: XTA) dropped 3.33 percent to £32.48, while Anglo American (LSE: AAL) fell 3.61 percent to £32.04 and Lonmin was 3.64 percent lower to £41.54.

The best performance on the day on the 100 came from property developer Land Securities (LSE: LAND), which added 4.8 percent to £18.35.

Public transport group Arriva (LSE: ARI) had the best day on the 250 as it gained 7.92 percent to 770p after it was revealed that it had been awarded the UK Cross Country rail franchise.

There were also gains in the retail sector.

J Sainsbury (LSE: SBRY) was 1.05 percent higher to 577.5p, while Marks & Spencer (LSE: MKS) was up 1.26 percent to 640.5p on a trading update that was not as bad as had been anticipated.

In the same sector on the 250, WH Smith (LSE: SMWH) added 2.04 percent to 411.75p.

Equities markets were mixed in London on Tuesday. The FTSE 100 added 0.6 percent to 6,227.6, while the FTSE 250 fell 0.6 percent to 11,102.2.

Oil companies were higher on takeover rumors, as it was said that either Royal Dutch Shell or BP could be interested in bidding on BG Group. Shell added 0.6 percent to £17.18, while BP gained 0.7 percent to 545p and BG Group was 1.7 percent higher to 662½p.

Supermarkets were also higher on the session. Wm Morrison was up 0.1 percent to 284p on positive comments from Deutsche Bank, which reconfirmed its “buy” recommendation and target share price of 320p. Elsewhere in the sector, Tesco gained 0.3 percent to 415¼p, while J Sainsbury added 0.8 percent to 438p on talk that private equity has approached with a bid.

In other retail news, magazine and bookseller WH Smith gained 5.6 percent after it issued a positive trading statement.

Among makers of medical devices, Smith & Nephew was 2.3 percent higher to 566¾p after it announced a special dividend and held out the possibility of more cost cutting measures. Goldman Sachs said that the company, thought to be a possible bid target from private equity, would forestall such a bid. Elsewhere in the sector, Gyrus added 1.1 percent to 406¾p.