The Mexican baseball league has been forced to suspend a game in progress because of gunfire at a stadium.

因体育馆发出枪声，墨西哥棒球联盟被迫终止一场正在进行的球赛。

The game between the Broncos at their home stadium in Reynosa and the Monterrey Sultans was suddenly interrupted（中断） when gunshots were heard.

Witnesses said the baseball players ran for cover and dived into their dugouts（棒球场边供球员休息的地方，独木舟） .

Panic spread through the crowd of spectators（观众，旁观者） after a group of unknown gunmen exchanged fire on Sunday.

Baseball officials then took the decision to stop the game.

There are no reports of casualties（伤亡） .

A spokesman for the league, Gabriel Medina, said: "We had to re-schedule for security reasons.

"This is an unprecedented¹（空前的） incident," he added.

The game will resume on Friday in the city of Monterrey.

War on drugs

However, Monterrey has also seen a recent upsurge（涌起，高涨） in drug-related violence with at least five people killed there at the weekend - one of them decapitated（斩首，杀头） .

Authorities in Reynosa do not know whether the shots at the Adolfo Lopez Mateos stadium are linked to organised drugs gangs.

But security analysts² say drug-related violence in Mexico is spiralling out of control.

More than 23,000 lives are estimated to have been lost so far in turf wars（地盘站） between rival drug cartels and state security forces.

US anti-narcotics（麻醉毒品） officials have noted³ that the unrest has started to spill over the border.

The shootings in Reynosa are close to the US state of Texas.