ROTENBURG, Germany, Feb 7 (Reuters) - Two Vietnamese men have been arrested over shootings at a Chinese restaurant in which seven people were killed, police said on Wednesday.

The two suspects were stopped by police during a routine traffic check in northern Germany on Monday and initially held on suspicion of entering the country illegally, police said.

Police said their hired car matched a description given by witnesses near the Lin Yue restaurant in the small town of Sittensen where three men and three women were found shot dead. Another employee later died of his injuries in hospital.

"Neither of the men are commenting on the matter," said police spokeswoman Petra Guderian in the nearby town of Rotenburg where the investigation is being led. "They also found a piece of paper with drawings on it that may be linked to the scene of the crime."

The husband of a Malaysian waitress discovered the body of his 36-year-old wife and the other victims, some bound, in different rooms of the restaurant early on Monday morning.

An two-year-old child was found unharmed.

German newspapers reported that Chinese triads, or mafia, might have been responsible for the killing.

The four victims so far identified by police included the Malaysian waitress, a 31-year-old Thai man, and the 36-year-old restaurant manager and his wife, 28, both Hong Kong Chinese who held British passports.

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