A further 12 people have been arrested by Chinese police investigating a scandal over toxic baby formula.
This brings to 18 the number of people arrested over the affair, which has left four babies dead and thousands more sick.
Ten other people, including the chairwoman of the company that produced the formula, are being questioned.
The Sanlu company revealed last week that its milk powder contained the banned substance melamine.
At the latest count, some 6,240 children have become sick, with about 160 suffering acute kidney failure.
The company has recalled all of its products and is offering compensation to affected families.
China, which has been hit by numerous contamination scandals, is also trying to reassure its export markets.
It says no problems have been reported in countries that bought imports from the company in question, but products are being recalled all the same.